Respuesta :
Answer:
C. (x,-x^2-10x-21) where -8<- x <- -2
Step-by-step explanation:
The function that describes all solutions for f(x) is (x, x2 − 10x − 21), where −8 ≤ x ≤ −2.
What is a system of equations?
A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.
Given equation:
f(x) = -x²-10x-21
x²+10x+21=0
x²+7x+3x+21=0
(x+7)(x+3)=0
So, the roots are -7 and -3.
Hence, function that describes all solutions for f(x) is (x, x2 − 10x − 21), where −8 ≤ x ≤ −2.
Learn more about equations here;
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