Answer:
2x² - 4x - 16
Explanation:
(2x + 4)(x - 4)
each term in the second factor is multiplied by ech term in the first factor
2x(x - 4) + 4(x - 4) ← distribute parenthesis
= 2x² - 8x + 4x - 16 ← collect like terms
= 2x² - 4x - 16
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