Question

P(x) =0.02x³+0.04x²+0.3x+1.2.Evaluate P(18) by direct substitution and by applying the remainder theorm

Answer 1

136.2

Explanation:

Plugin x = 18 in the polynomial.

P(x) = 0.02x³ + 0.04x² + 0.3x + 1.2

P(18)= 0.02*(18)³ + 0.04*(18)² + 0.3*18 + 1.2

= 0.02 * 5832 + 0.04*324 + 5.4 + 1.2

= 116.64 + 12.96 + 5.4 + 1.2

= 136.2