High School

Find the quadratic function [tex]f(x) = ax^2 + bx + c[/tex] for which [tex]f(1) = -10[/tex], [tex]f(-3) = 46[/tex], and [tex]f(3) = -2[/tex]. What is the function?

Answer :

The quadratic function satisfying the given conditions is f(x) = 2x² - 5x - 7.

To find the quadratic function f(x)= ax²+bx+c with the given values f(1)=-10, f(-3)=46, and f(3)=-2, we can set up a system of equations:

a[tex](1)^2[/tex] + b(1) + c = -10

a[tex](-3)^2[/tex] + b(-3) + c = 46

a[tex](3)^2[/tex] + b(3) + c = -2

By substituting and simplifying, these become:

a + b + c = -10

9a - 3b + c = 46

9a + 3b + c = -2

Through a process of elimination and substitution, we determine that:

a = 2

b = -5

c = -7

Therefore, the quadratic function is f(x) = 2x² - 5x - 7.

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