Which is f(5) for the function 2x2 + 2x - 3?
2 answers:
Replace every x you see with 5 and do the math.
f(x) = 2x^2 + 2x - 3
f(5) = 2(5)^2 + 2(5) - 3
f(5) = 2(25) + 10 - 3
f(5) = 50 + 10 - 3
f(5) = 60 - 3
f(5) = 57
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