Express (x – 1)(x + 2)(2x + 2) in standard form
1 answer:
Answer:
2x³ + 4x² - 2x - 4
Step-by-step explanation:
Expand the first pair of factors then multiply by (2x + 2)
= (x² + x - 2)(2x + 2) → distribute terms
= x²(2x + 2) + x(2x + 2) - 2(2x + 2)
= 2x³ + 2x² + 2x² + 2x - 4x - 4 ( collect like terms )
= 2x³ + 4x² - 2x - 4 ← in standard form
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