Question

Resuelve para x:
x²-18x+81=0

Answer 1

x² -18x +81= 0

a=1
b=-18
c = 81

-b±√[b²-4ac]/2a

18±√[-18²-4(1)(81)]/2(1)

18±√[324-324]/2

18±0/2

x¹= [18+0]/2 = 9

x²= [18-0]/2 = 9


(x-9)²