Question

What is the simplified form of this expression?

(-3x2 + 2x − 4) + (4x2 + 5x + 9)


7x2 + 7x + 5

x2 + 7x + 5

x2 + 7x + 13

x2 + 11x + 1

Answer 1

x² + 7x + 5

Explanation:

(- 3x² + 2x - 4) + (4x² + 5x + 9)

since both parenthesis are being multiplies by 1 , remove parenthesis

= - 3x² + 2x - 4 + 4x² + 5x + 9 ← collect like terms

= (- 3x² + 4x²) + (2x + 5x) + (- 4 + 9)

= x² + 7x + 5