Solve x^2 - 45 = 4x

Evaluate

x^{2} - 45 = 4 x

Move the expression to the left side

x^{2} - 45 - 4 x = 0

Factor the expression

More Steps

(x - 9) (x + 5) = 0

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

x - 9 = 0 x + 5 = 0

Solve the equation for x

More Steps

x = 9 x + 5 = 0

Solve the equation for x

More Steps

x = 9 x = - 5

Solution

x_{1} = - 5, x_{2} = 9

Solve the quadratic equation