Question

Найдите f(-4), f(9), f(-7), f(6), если f(x)=(x+4)(x-7)

Answer 1

f(x)=(x+4)(x-7)

f(-4)=(-4+4)(-4-7)=0

f(9)=(9+4)(9-7)=13*2=26

f(-7)=(-7+4)(-7-7)=-3*(-14)=42

f(6)=(6+4)(6-7)=10*(-1)=-10