Question

If P(x)=x3 +x2 +2x+1 then P(-1) is equal to. (1) (a) 0 (b) 1 (c) -1 (d)2

Answer 1

Answer:

$p(x) = {x}^{3} + {x}^{2} + 2x + 1 \\ p(x) = - 1 \\ = {( - 1)}^{3} + {( - 1 ) }^{2} + 2( - 1) + 1 \\ = - 1 + 1 - 2 + 1 \\ = 0 - 2 + 1 \\ = - 1 \\ \purple{ \underline{ \over\fbox{ (c) - 1}}}$

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