Find the roots of x2−18x+81=0x^2 - 18x + 81 = 0x2−18x+81=0.
x=3,27x = 3, 27x=3,27
x=9x = 9x=9 (double root)
x=−9x = -9x=−9 (double root)
x=0,18x = 0, 18x=0,18