Question

perform the operation.
$(2x^2 - 4) - (-x^2 + 3x - 6)$

Explanation:

Step1: Distribute the negative sign

$2x^2 - 4 + x^2 - 3x + 6$

Step2: Combine like $x^2$ terms

$2x^2 + x^2 = 3x^2$

Step3: Combine constant terms

$-4 + 6 = 2$

Step4: Assemble simplified expression

$3x^2 - 3x + 2$

Answer:

$3x^2 - 3x + 2$