Question

X^2 - 18x + 81 = 0 x=?

Answer 1

x = 9

Explanation:

Solve for x:

x^2 - 18 x + 81 = 0

Write the left hand side as a square:

(x - 9)^2 = 0

Take the square root of both sides:

x - 9 = 0

Add 9 to both sides:

Answer: x = 9