taetae1987
contestada

Given r(x)= -5-x and s(x)=x²-8, which of the following is equivalent to t(x)=s(r(x))
a) t(x)= x²+10x+17
b) t(x)= -x²+3
c) t(x)= -x²-13
d) t(x)= x²-10x+3
e) None of the above​

Respuesta :

The answer would be s(r(x)) = -8 + (-8 + x² )²
NDHT
s(r(x)) = (-5-x)^2 -8
= 25 + 10x + x^2 - 8
= x^2 + 10x + 17