Solve x^2-20x+100=121

Evaluate

x^{2} - 20 x + 100 = 121

Move the expression to the left side

x^{2} - 20 x - 21 = 0

Factor the expression

More Steps

(x - 21) (x + 1) = 0

When the product of factors equals 0,at least one factor is 0

x - 21 = 0 x + 1 = 0

Solve the equation for x

More Steps

x = 21 x + 1 = 0

Solve the equation for x

More Steps

x = 21 x = - 1

Solution

x_{1} = - 1, x_{2} = 21

Solve the quadratic equation