Nsquared + n squared+ n squared for n = - 1

given

for n = -1

substitute them into the equation

when you square a negative number, it becomes positive.

because negative×negative = positive

as final answer

5x + 5

step-by-step explanation:

you should always add the diagrams and graphs we cannot see. this particular question is kind of borderline because we can make a graph for you.

(f + g)x = -x^2 +3x + 5 + x^2 + 2x

(f + g)x = 5x + 5

the graph of z = 5x + 5 is shown below. always use desmos when in doubt.