代数示例

$(- 10 m^{9} - 4 m^{8} - 12 m^{6}) \div 2 m^{4}$

Step 1

建立要用于相除的多项式。如果不是对于所有指数都有对应的项，则插入带 $0$ 值的项。

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

Step 2

将被除数中的最高阶项 $- 10 m^{9}$ 除以除数中的最高阶项 $2 m^{4}$ 。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

Step 3

将新的商式项乘以除数。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

Step 4

因为要从被除数中减去该表达式，所以应改变 $- 10 m^{9} + 0 + 0 + 0 + 0$ 中的所有符号

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

Step 5

改变符号后，将相乘所得的多项式和最后的被除数相加，得到新的被除数。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

Step 6

从原来的被除数向下提取下一项到当前被除数中。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

Step 7

将被除数中的最高阶项 $- 4 m^{8}$ 除以除数中的最高阶项 $2 m^{4}$ 。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

Step 8

将新的商式项乘以除数。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$4 m^{8}$

$0$

Step 9

因为要从被除数中减去该表达式，所以应改变 $- 4 m^{8} + 0 + 0 + 0 + 0$ 中的所有符号

									-	$5 m^{5}$	-	$2 m^{4}$
$2 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$	-	$10 m^{9}$	-	$4 m^{8}$	+	$0 m^{7}$	-	$12 m^{6}$	+	$0 m^{5}$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$
									+	$10 m^{9}$	-	$0$	-	$0$	-	$0$	-	$0$
											-	$4 m^{8}$	+	$0$	-	$12 m^{6}$	+	$0$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$
											+	$4 m^{8}$	-	$0$	-	$0$	-	$0$	-	$0$

Step 10

改变符号后，将相乘所得的多项式和最后的被除数相加，得到新的被除数。

									-	$5 m^{5}$	-	$2 m^{4}$
$2 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$	-	$10 m^{9}$	-	$4 m^{8}$	+	$0 m^{7}$	-	$12 m^{6}$	+	$0 m^{5}$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$
									+	$10 m^{9}$	-	$0$	-	$0$	-	$0$	-	$0$
											-	$4 m^{8}$	+	$0$	-	$12 m^{6}$	+	$0$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$
											+	$4 m^{8}$	-	$0$	-	$0$	-	$0$	-	$0$
															-	$12 m^{6}$	+	$0$	+	$0$

Step 11

从原来的被除数向下提取下一项到当前被除数中。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

Step 12

将被除数中的最高阶项 $- 12 m^{6}$ 除以除数中的最高阶项 $2 m^{4}$ 。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$6 m^{2}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

Step 13

将新的商式项乘以除数。

$5 m^{5}$

$2 m^{4}$

$0 m^{3}$

$6 m^{2}$

$2 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$4 m^{8}$

$0 m^{7}$

$12 m^{6}$

$0 m^{5}$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$10 m^{9}$

$0$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{4}$

$0 m^{3}$

$0 m^{2}$

$4 m^{8}$

$0$

$12 m^{6}$

$0$

$0 m^{3}$

$0 m^{2}$

$0 m$

$0$

$12 m^{6}$

$0$

Step 14

因为要从被除数中减去该表达式，所以应改变 $- 12 m^{6} + 0 + 0 + 0 + 0$ 中的所有符号

									-	$5 m^{5}$	-	$2 m^{4}$	+	$0 m^{3}$	-	$6 m^{2}$
$2 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$	-	$10 m^{9}$	-	$4 m^{8}$	+	$0 m^{7}$	-	$12 m^{6}$	+	$0 m^{5}$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$
									+	$10 m^{9}$	-	$0$	-	$0$	-	$0$	-	$0$
											-	$4 m^{8}$	+	$0$	-	$12 m^{6}$	+	$0$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$
											+	$4 m^{8}$	-	$0$	-	$0$	-	$0$	-	$0$
															-	$12 m^{6}$	+	$0$	+	$0$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$
															+	$12 m^{6}$	-	$0$	-	$0$	-	$0$	-	$0$

Step 15

改变符号后，将相乘所得的多项式和最后的被除数相加，得到新的被除数。

									-	$5 m^{5}$	-	$2 m^{4}$	+	$0 m^{3}$	-	$6 m^{2}$
$2 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$	-	$10 m^{9}$	-	$4 m^{8}$	+	$0 m^{7}$	-	$12 m^{6}$	+	$0 m^{5}$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$
									+	$10 m^{9}$	-	$0$	-	$0$	-	$0$	-	$0$
											-	$4 m^{8}$	+	$0$	-	$12 m^{6}$	+	$0$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$
											+	$4 m^{8}$	-	$0$	-	$0$	-	$0$	-	$0$
															-	$12 m^{6}$	+	$0$	+	$0$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$
															+	$12 m^{6}$	-	$0$	-	$0$	-	$0$	-	$0$
																								$0$

Step 16

从原来的被除数向下提取下一项到当前被除数中。

									-	$5 m^{5}$	-	$2 m^{4}$	+	$0 m^{3}$	-	$6 m^{2}$
$2 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$	-	$10 m^{9}$	-	$4 m^{8}$	+	$0 m^{7}$	-	$12 m^{6}$	+	$0 m^{5}$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$
									+	$10 m^{9}$	-	$0$	-	$0$	-	$0$	-	$0$
											-	$4 m^{8}$	+	$0$	-	$12 m^{6}$	+	$0$	+	$0 m^{4}$	+	$0 m^{3}$	+	$0 m^{2}$
											+	$4 m^{8}$	-	$0$	-	$0$	-	$0$	-	$0$
															-	$12 m^{6}$	+	$0$	+	$0$	+	$0 m^{3}$	+	$0 m^{2}$	+	$0 m$	+	$0$
															+	$12 m^{6}$	-	$0$	-	$0$	-	$0$	-	$0$
																								$0$	+	$0 m$	+	$0$

Step 17

因为余数为 $0$ ，所以最终答案是商。

$- 5 m^{5} - 2 m^{4} + 0 m^{3} - 6 m^{2}$

代数 示例

代数示例