Question

1. simplify the expression: $3x^2 + 2x - 4 + 5x^2 - 3x$.

a. $3x^2 - x - 4$
b. $2x^2 - 4x + 4$
c. $8x^2 - 5x - 4$
d. $8x^2 - x - 4$

Explanation:

Step1: Combine $x^2$ terms

$3x^2 + 5x^2 = 8x^2$

Step2: Combine $x$ terms

$2x - 3x = -x$

Step3: Keep constant term

$-4$

Step4: Combine all terms

$8x^2 - x - 4$

Answer:

d. $8x^2 - x - 4$