Question 3735
This is a quadratic equation

Here is how you solve it 
1) Add 30 to both sides
2) Add the square of 1/2 of the coeficcient of x to both sides
3) Make the left side the square of a bionomial
4) Take the square root of each side
5) Solve

Work
1) {{{p^2+13p-30+30=0+30}}}
1a){{{p^2+13p=30}}}
2) {{{p^2+13p+76.25=106.25}}}
3) {{{(p+7.5)^2=106.25}}}
4) {{{p+7.5=10.30}}}
5) {{{p=2.8}}}