Question

perform the operation.
\\((10x^2 + 8x - 5) - (-9x^2 - 3x - 4)\\)

Explanation:

Step1: Distribute the negative sign

$10x^2 + 8x - 5 + 9x^2 + 3x + 4$

Step2: Combine like $x^2$ terms

$10x^2 + 9x^2 = 19x^2$

Step3: Combine like $x$ terms

$8x + 3x = 11x$

Step4: Combine constant terms

$-5 + 4 = -1$

Step5: Combine all simplified terms

$19x^2 + 11x - 1$

Answer:

$19x^2 + 11x - 1$