Given f, of, x, equals, minus, x, squared, minus, 8, xf(x)=−x 2 −8x, find f, of, minus, 3f(−3)
Question
Solution 1
To find the value of f(-3), you need to substitute -3 into the function f(x) = -x^2 - 8x.
Step 1: Substitute -3 for x in the equation. f(-3) = -(-3)^2 - 8*(-3)
Step 2: Simplify the equation. f(-3) = -9 + 24
Step 3: Solve the equation. f(-3) = 15
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