Pre-Algebra Examples

$- 3 x^{2} + 5 x - 8 + - 10 x^{2} - x - 3$

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 $1 \cdot - 1 = - 1$

$- 3 x^{2} + 5 x - 8 - 10 x^{2} - x - 3$

Step 2

Subtract $10 x^{2}$ from $- 3 x^{2}$ .

$- 13 x^{2} + 5 x - 8 - x - 3$

Step 3

Subtract $x$ from $5 x$ .

$- 13 x^{2} + 4 x - 8 - 3$

Step 4

Subtract $3$ from $- 8$ .

$- 13 x^{2} + 4 x - 11$