Pre-Algebra Examples

$- 8 x^{2} + 3 + - 9 x^{2} + 3 x - 3$

Step 1

Replace all occurrences of $+$ $-$ with a single $-$ . A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because $1 \cdot - 1 = - 1$

$- 8 x^{2} + 3 - 9 x^{2} + 3 x - 3$

Step 2

Combine the opposite terms in $- 8 x^{2} + 3 - 9 x^{2} + 3 x - 3$ .

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Step 2.1

Subtract $3$ from $3$ .

$- 8 x^{2} - 9 x^{2} + 3 x + 0$

Step 2.2

Add $- 8 x^{2} - 9 x^{2} + 3 x$ and $0$ .

$- 8 x^{2} - 9 x^{2} + 3 x$

Step 3

Subtract $9 x^{2}$ from $- 8 x^{2}$ .

$- 17 x^{2} + 3 x$