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If f(x) = x2 – 2x, find:
f(-3) = [?]

1 Answer

4 votes

Answer:


\boxed{\sf f(-3) = 9}

Given:


\sf f(x) = {x}^(2) - 2x

To Find:

Value of f(x) when x = -3

Explanation:


\sf \implies f(x) = {x}^(2) - 2x \\ \\ \sf \implies f( - 3) = {( - 3)}^(2) - 2 ( - 3) \\ \\ \sf \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 3 - ( - 6) \\ \\ \sf \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: =3 + 6 \\ \\ \sf \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: =9

User Gonza Oviedo
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