Step-by-step explanation:
-7(-1)²(2)+2(-1)³-(2)²
-7(1)(2)+2(-1)-4
-7(2)+-2-4
-14+-2-4
-16-4
=-20
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Step-by-step explanation:
-7(-1)²(2)+2(-1)³-(2)²
-7(1)(2)+2(-1)-4
-7(2)+-2-4
-14+-2-4
-16-4
=-20