1. 6x2-4x (x-1) + x(4+5x) and verify your answer for x=-1
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Step-by-step explanation:
12-4x²+4x+4x+5x²
12-4(-1)²+4(-1)+4(-1)+5(-1)²
12-4(1)-4-4+5(1)
12-4-4-4+5
5
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