#2**0 **

First find g(5) by putting in 5 for x

5(-5) + 2 (-5)^2 = -25 + 50 = 25

then put 25 in f(x)

3 - sqrt(25) = 3 - 5 = -2 (it COULD be (3 - -5) = 8 because sqrt 25 is +-5 )

ElectricPavlov May 21, 2019

#3**+3 **

\(\sqrt{25}\) equals only 5

\(\pm\sqrt{25}\) equals ± 5

See: https://en.wikipedia.org/wiki/Radical_symbol#Principal_square_root

hectictar
May 21, 2019