Question

If (f (x) = x ^ 2-5x + 7, what will be the value f (-2)?​

Answer 1

Given -

$f(x) = {x}^{2} - 5x + 7$

$f( - 2)$

To,

Find the value of $f (-2)$

Solution -

$f(x) = {x}^{2} - 5x + 7$

$f( - 2) = {( - 2)}^{2} - 5( - 2) + 7$

$=> 4 + 10 + 7$

$=> 14 + 7$

$21$

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$\therefore$ Value of $f(-2)$ is 21

Answer 2

Answer:

21

Step-by-step explanation:

Put x = -2 in given equation

We have,

$(-2)^{2}$  $-5 (-2)$ $+ 7$

4 + 10 + 7

21