Question

adding and subtracting polynomials
score: 4/5 penalty: 1 off
question
subtract 5x^{2}-9x - 10 from -6x^{2}+6x.

Explanation:

Step1: Write the subtraction expression

$(-6x^{2}+6x)-(5x^{2}-9x - 10)$

Step2: Distribute the negative sign

$-6x^{2}+6x - 5x^{2}+9x + 10$

Step3: Combine like - terms

$(-6x^{2}-5x^{2})+(6x + 9x)+10$
$=-11x^{2}+15x + 10$

Answer:

$-11x^{2}+15x + 10$