代数示例

$\frac{- 15 x^{7} - 12 x^{6} + 24 x^{4} - 6 x^{2}}{- 3 x^{4}}$

解题步骤 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。

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$15 x^{7}$

$12 x^{6}$

$0 x^{5}$

$24 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

解题步骤 2

将被除数中的最高阶项 $- 15 x^{7}$ 除以除数中的最高阶项 $- 3 x^{4}$ 。

$5 x^{3}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$15 x^{7}$

$12 x^{6}$

$0 x^{5}$

$24 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

解题步骤 3

将新的商式项乘以除数。

$5 x^{3}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$15 x^{7}$

$12 x^{6}$

$0 x^{5}$

$24 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$15 x^{7}$

$0$

解题步骤 4

因为要从被除数中减去该表达式，所以应改变 $- 15 x^{7} + 0 + 0 + 0 + 0$ 中的所有符号

$5 x^{3}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$15 x^{7}$

$12 x^{6}$

$0 x^{5}$

$24 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$15 x^{7}$

$0$

解题步骤 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。

$5 x^{3}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$15 x^{7}$

$12 x^{6}$

$0 x^{5}$

$24 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$15 x^{7}$

$0$

$12 x^{6}$

$0$

$24 x^{4}$

$0$

解题步骤 6

从原来的被除数向下提取下一项到当前被除数中。

$5 x^{3}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$15 x^{7}$

$12 x^{6}$

$0 x^{5}$

$24 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$15 x^{7}$

$0$

$12 x^{6}$

$0$

$24 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

解题步骤 7

将被除数中的最高阶项 $- 12 x^{6}$ 除以除数中的最高阶项 $- 3 x^{4}$ 。

$5 x^{3}$

$4 x^{2}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$15 x^{7}$

$12 x^{6}$

$0 x^{5}$

$24 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$15 x^{7}$

$0$

$12 x^{6}$

$0$

$24 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

解题步骤 8

将新的商式项乘以除数。

$5 x^{3}$

$4 x^{2}$

$3 x^{4}$

$0 x^{3}$

$0 x^{2}$

$0 x$

$0$

$15 x^{7}$

$12 x^{6}$

$0 x^{5}$

$24 x^{4}$

$0 x^{3}$

$6 x^{2}$

$0 x$

$0$

$15 x^{7}$

$0$

$12 x^{6}$

$0$

$24 x^{4}$

$0$

$6 x^{2}$

$0 x$

$0$

$12 x^{6}$

$0$

解题步骤 9

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

											$5 x^{3}$	+	$4 x^{2}$
-	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$15 x^{7}$	-	$12 x^{6}$	+	$0 x^{5}$	+	$24 x^{4}$	+	$0 x^{3}$	-	$6 x^{2}$	+	$0 x$	+	$0$
										+	$15 x^{7}$	-	$0$	-	$0$	-	$0$	-	$0$
												-	$12 x^{6}$	+	$0$	+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
												+	$12 x^{6}$	-	$0$	-	$0$	-	$0$	-	$0$

解题步骤 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。

											$5 x^{3}$	+	$4 x^{2}$
-	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$15 x^{7}$	-	$12 x^{6}$	+	$0 x^{5}$	+	$24 x^{4}$	+	$0 x^{3}$	-	$6 x^{2}$	+	$0 x$	+	$0$
										+	$15 x^{7}$	-	$0$	-	$0$	-	$0$	-	$0$
												-	$12 x^{6}$	+	$0$	+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
												+	$12 x^{6}$	-	$0$	-	$0$	-	$0$	-	$0$
																+	$24 x^{4}$	+	$0$	-	$6 x^{2}$

解题步骤 11

从原来的被除数向下提取下一项到当前被除数中。

											$5 x^{3}$	+	$4 x^{2}$
-	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$15 x^{7}$	-	$12 x^{6}$	+	$0 x^{5}$	+	$24 x^{4}$	+	$0 x^{3}$	-	$6 x^{2}$	+	$0 x$	+	$0$
										+	$15 x^{7}$	-	$0$	-	$0$	-	$0$	-	$0$
												-	$12 x^{6}$	+	$0$	+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
												+	$12 x^{6}$	-	$0$	-	$0$	-	$0$	-	$0$
																+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$

解题步骤 12

将被除数中的最高阶项 $24 x^{4}$ 除以除数中的最高阶项 $- 3 x^{4}$ 。

											$5 x^{3}$	+	$4 x^{2}$	+	$0 x$	-	$8$
-	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$15 x^{7}$	-	$12 x^{6}$	+	$0 x^{5}$	+	$24 x^{4}$	+	$0 x^{3}$	-	$6 x^{2}$	+	$0 x$	+	$0$
										+	$15 x^{7}$	-	$0$	-	$0$	-	$0$	-	$0$
												-	$12 x^{6}$	+	$0$	+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
												+	$12 x^{6}$	-	$0$	-	$0$	-	$0$	-	$0$
																+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$

解题步骤 13

将新的商式项乘以除数。

											$5 x^{3}$	+	$4 x^{2}$	+	$0 x$	-	$8$
-	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$15 x^{7}$	-	$12 x^{6}$	+	$0 x^{5}$	+	$24 x^{4}$	+	$0 x^{3}$	-	$6 x^{2}$	+	$0 x$	+	$0$
										+	$15 x^{7}$	-	$0$	-	$0$	-	$0$	-	$0$
												-	$12 x^{6}$	+	$0$	+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
												+	$12 x^{6}$	-	$0$	-	$0$	-	$0$	-	$0$
																+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
																+	$24 x^{4}$	+	$0$	+	$0$	+	$0$	+	$0$

解题步骤 14

因为要从被除数中减去该表达式，所以应改变 $24 x^{4} + 0 + 0 + 0 + 0$ 中的所有符号

											$5 x^{3}$	+	$4 x^{2}$	+	$0 x$	-	$8$
-	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$15 x^{7}$	-	$12 x^{6}$	+	$0 x^{5}$	+	$24 x^{4}$	+	$0 x^{3}$	-	$6 x^{2}$	+	$0 x$	+	$0$
										+	$15 x^{7}$	-	$0$	-	$0$	-	$0$	-	$0$
												-	$12 x^{6}$	+	$0$	+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
												+	$12 x^{6}$	-	$0$	-	$0$	-	$0$	-	$0$
																+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
																-	$24 x^{4}$	-	$0$	-	$0$	-	$0$	-	$0$

解题步骤 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。

											$5 x^{3}$	+	$4 x^{2}$	+	$0 x$	-	$8$
-	$3 x^{4}$	+	$0 x^{3}$	+	$0 x^{2}$	+	$0 x$	+	$0$	-	$15 x^{7}$	-	$12 x^{6}$	+	$0 x^{5}$	+	$24 x^{4}$	+	$0 x^{3}$	-	$6 x^{2}$	+	$0 x$	+	$0$
										+	$15 x^{7}$	-	$0$	-	$0$	-	$0$	-	$0$
												-	$12 x^{6}$	+	$0$	+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
												+	$12 x^{6}$	-	$0$	-	$0$	-	$0$	-	$0$
																+	$24 x^{4}$	+	$0$	-	$6 x^{2}$	+	$0 x$	+	$0$
																-	$24 x^{4}$	-	$0$	-	$0$	-	$0$	-	$0$
																				-	$6 x^{2}$	+	$0$	+	$0$

解题步骤 16

最终答案为商加上余数除以除数。

$5 x^{3} + 4 x^{2} - 8 + \frac{- 6 x^{2}}{- 3 x^{4}}$

代数 示例

代数示例