Answer:
2x²+7x-4
Step-by-step explanation:
2x²+8x-x-4
2x² + 7x - 4
(2x + 1)(x + 4)
Each term in the second factor is multiplied by each term in the first factor, that is
2x(x + 4) - 1 (x + 4) ← distribute parenthesis
2x² + 8x - x - 4 ← collect like terms
= 2x² + 7x - 4
