Question 712202
For q#a,


If expression is positive
x^2+4x-40=5
x^+4x-40-5=0
{{{(x+9)(x-5)=0}}},
{{{x=-9}}} or {{{x=+5}}}


If expression is negative
-x^2-4x+40=5
.
{{{x^2+4x-35=0}}}  which cannot be factored.
Using solution to quadratic formula,
{{{x=-2-sqrt(13)}}} or {{{x=-2+sqrt(13)}}}