Question

Given P(x) = 2x3+ 3x2- x + 4, find P(0) and P(-2).

Answer 1

9514 1404 393

Answer:

P(0) = 4

P(-2) = 2

Explanation:

Put the value where the variable is and do the arithmetic.

P(0) = 2·0³ +3·0² -0 +4

P(0) = 4

__

P(-2) = 2·(-2)³ +3·(-2)² -(-2) +4 = 2(-8) +3(4) +2 +4

P(-2) = -16 +12 +2 +4

P(-2) = 2