Question

Oblicz wartość wielomianu w(x)=xdo potęgi3- 9x do potegi2+3x-21dla x=-2, x=1/3 proszę o pomoc:)

Answer 1

W(x)=x³-9x²+3x-21
W(-2)=(-2)³-9*(-2)²+3*(-2)-21=-8-9*4-6-21=-8-36-27=-71
W(1/3)=(1/3)³-9(1/3)²+3*(1/3)-21=1/27-9*(1/9)+1-21=1/27-1+1-21=1/27-21=-20 26/27