Question

Which is f(5) for the function –2x2 2x – 3? –107 –63 –43 –37.

Answer 1

The value of the function at x=5 is -43.

Expression

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations that are formed according to rules which are dependent on the context.  

Given equation

$f(x)=-2x^2+2x-3$

Solution

Equating the value in the given equation,

$\begin{aligned}f(x)&=-2x^2+2x-3\\f(5)&=-2(5)^2+2(5)-3\\&=-2(25)+10-3\\&=-50+10-3\\&=-43\end{aligned}$

Hence, the value of the function at x=5 is -43.

Learn more about Expression:

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