r2 was replaced by r^2
Factoring r2 -12r+36
The first term is ,r2 its coefficient is 1.
The middle term is -12 its coefficient is 12.
The last term is +36
-36+-1=-37
-18+-2=-20
-12+-3=-15
-9+-4=-13
-6+-6=-12
Rewrite the polynomial splitting the middle term using the two factors found in step two above:
-6 and -6
r2-6r-36r
r*(r-6)
6*(r-6)
(r-6)*(r-6)
(r-6)^2=0
r=6
The Answer is r=6
