What is x² - 30x+81=0

X² - 30x + 81 = 0

x = - (-30) + / - √ ((-30) ² - 4 (1) (81))

2 (1)

x = 30 + / - √ (900 - 324)

2

x = 30 + / - √ (576)

2

x = 30 + / - 24

2

x = 15 + 12

x = 15 + 12 x = 15 - 12

x = 27 x = 3

The solution to the problem is {27, 3}.