Question

b. $(3x^2 + x - 6) + (x^2 + 4x + 10)$

Explanation:

Step1: Group like terms

$(3x^2 + x^2) + (x + 4x) + (-6 + 10)$

Step2: Combine $x^2$ terms

$3x^2 + x^2 = 4x^2$

Step3: Combine $x$ terms

$x + 4x = 5x$

Step4: Combine constant terms

$-6 + 10 = 4$

Step5: Combine all results

$4x^2 + 5x + 4$

Answer:

$4x^2 + 5x + 4$