Use synthetic substitution to find f(3) and f(-4) for f(x)= x^4 - 8x- 11.

Question

asked Jan 23, 2022 61.8k views

2 Answers

Refriedjello · Answer 1 · 2022-01-27T07:52:54+0000

Answer:

f(3)=56, f(-4)=277

Explanation:

f(x)=x^4-8x-11

f(3)=3^4-8(3)-11=3*3*3*3-24-11=9*3*3-35=27*3-25=81-25=56

f(-4)=(-4)^4-8(-4)-11=(-4)(-4)(-4)(-4)+32-11=(16)(16)+32-11=256+32-11=288-11=277