Question 517758
x^2-3x-180=0
(-3)^2-4(1)(-180)
9+720=729 -> delta
x=[-(-3)+/- root 729]/2*1
x=[3 +/- 27]/2
x'= [3+27]/2  x'=30/2 x'=15
x"= [3-27]/2  x"=-24/2 x"=-12
 answer x'=15 and x"=-12