Given f, of, x, equals, 3, x, squared, minus, 5, x, plus, 20f(x)=3x 2 −5x+20, find f, of, minus, 8f(−8)
Question
Given f, of, x, equals, 3, x, squared, minus, 5, x, plus, 20f(x)=3x 2 −5x+20, find f, of, minus, 8f(−8)
Solution
To find the value of f(-8), you need to substitute -8 in place of x in the function f(x) = 3x^2 - 5x + 20.
Step 1: Substitute x with -8 in the equation f(-8) = 3(-8)^2 - 5(-8) + 20
Step 2: Solve the equation f(-8) = 3(64) + 40 + 20 f(-8) = 192 + 40 + 20 f(-8) = 252
So, f(-8) = 252.
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