When f(x)=2x^2+3, find f(-3).
1 answer:
Answer:
f(-3) = 21
Step-by-step explanation:
We "evaluate" the function f(x)=2x^2+3 at x = -3 by subbing -3 for x in f(x)=2x^2+3:
f(-3) = 2(-3)^2 + 3 = 2(9) + 3 = 21.
Thus, f(-3) = 21
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