Question

1. $(2x^{2}+6x)+(4x^{2}+8x+3)$

Explanation:

Step1: Remove parentheses

$2x^2 + 6x + 4x^2 + 8x + 3$

Step2: Combine like $x^2$ terms

$2x^2 + 4x^2 = 6x^2$

Step3: Combine like $x$ terms

$6x + 8x = 14x$

Step4: Combine constant terms

(No other constants, keep 3)

Step5: Assemble simplified expression

$6x^2 + 14x + 3$

Answer:

$6x^2 + 14x + 3$