Question

If f(x) = 4x² + +5 then, f(-2)

Answer 1

Answer:

Step-by-step explanation:

equation is given as

$fx=4x^{2} +5$ if $fx$ is $f(-2)$ then we knew the vale of x which is $-2$ so we will substitute it in the equation as:

$f(-2) = 4(-2)^{2} +5$

solve:

$-2f=4(4)+5\\-2f=16+5\\-2f=21\\\frac{-2f}{-2} =\frac{21}{-2}$

$f=\frac{21}{-2}$

$f=-10.5$