Question

the value of 2a³ +2a²+2a-7 when a=(-2)​

Answer 1

2a³ + 2a² + 2a - 7

Put a = -2 in above Equation,

2(-2)³ + 2(-2)² + 2(-2) - 7

2×(-8) + 2×2 + (-4) - 7

-16 + 4 - 4 - 7

-23

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