x^2-8x=-30

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Solution for x^2-8x=-30 equation:


Simplifying
x2 + -8x = -30

Reorder the terms:
-8x + x2 = -30

Solving
-8x + x2 = -30

Solving for variable 'x'.

Reorder the terms:
30 + -8x + x2 = -30 + 30

Combine like terms: -30 + 30 = 0
30 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-30' to each side of the equation.
30 + -8x + -30 + x2 = 0 + -30

Reorder the terms:
30 + -30 + -8x + x2 = 0 + -30

Combine like terms: 30 + -30 = 0
0 + -8x + x2 = 0 + -30
-8x + x2 = 0 + -30

Combine like terms: 0 + -30 = -30
-8x + x2 = -30

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -30 + 16

Reorder the terms:
16 + -8x + x2 = -30 + 16

Combine like terms: -30 + 16 = -14
16 + -8x + x2 = -14

Factor a perfect square on the left side:
(x + -4)(x + -4) = -14

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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