x^2-4x-11=-30

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Solution for x^2-4x-11=-30 equation:


Simplifying
x2 + -4x + -11 = -30

Reorder the terms:
-11 + -4x + x2 = -30

Solving
-11 + -4x + x2 = -30

Solving for variable 'x'.

Reorder the terms:
-11 + 30 + -4x + x2 = -30 + 30

Combine like terms: -11 + 30 = 19
19 + -4x + x2 = -30 + 30

Combine like terms: -30 + 30 = 0
19 + -4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-19' to each side of the equation.
19 + -4x + -19 + x2 = 0 + -19

Reorder the terms:
19 + -19 + -4x + x2 = 0 + -19

Combine like terms: 19 + -19 = 0
0 + -4x + x2 = 0 + -19
-4x + x2 = 0 + -19

Combine like terms: 0 + -19 = -19
-4x + x2 = -19

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = -19 + 4

Reorder the terms:
4 + -4x + x2 = -19 + 4

Combine like terms: -19 + 4 = -15
4 + -4x + x2 = -15

Factor a perfect square on the left side:
(x + -2)(x + -2) = -15

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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