use quadratic formula to solve the following problems?

Question

#1) x^2+12x=-36


#2 2x^2+5x-2=0



#3 Now I have to do this one and explain to it to someone as if they don't know what they are doing just in problem #3
9-6r=8r

Answer 1

#1) x^2+12x=-36
a=1
b=12
c=36
delta=b*b-4*a*c
=144- 144=0
the roots are equal.
x1=x2=-12/2=-6

#2 2x^2+5x-2=0
a=2
b=5
c=-2
delta=25+16=41
x1=(-5-qrt(41))/4
x2==(-5+sqrt(41))/4

3)
9-6r=8r
9=14r
r=9/14