x^2+31=8x-4

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Solution for x^2+31=8x-4 equation:


Simplifying
x2 + 31 = 8x + -4

Reorder the terms:
31 + x2 = 8x + -4

Reorder the terms:
31 + x2 = -4 + 8x

Solving
31 + x2 = -4 + 8x

Solving for variable 'x'.

Reorder the terms:
31 + 4 + -8x + x2 = -4 + 8x + 4 + -8x

Combine like terms: 31 + 4 = 35
35 + -8x + x2 = -4 + 8x + 4 + -8x

Reorder the terms:
35 + -8x + x2 = -4 + 4 + 8x + -8x

Combine like terms: -4 + 4 = 0
35 + -8x + x2 = 0 + 8x + -8x
35 + -8x + x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
35 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-35' to each side of the equation.
35 + -8x + -35 + x2 = 0 + -35

Reorder the terms:
35 + -35 + -8x + x2 = 0 + -35

Combine like terms: 35 + -35 = 0
0 + -8x + x2 = 0 + -35
-8x + x2 = 0 + -35

Combine like terms: 0 + -35 = -35
-8x + x2 = -35

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 = -35 + 16

Reorder the terms:
16 + -8x + x2 = -35 + 16

Combine like terms: -35 + 16 = -19
16 + -8x + x2 = -19

Factor a perfect square on the left side:
(x + -4)(x + -4) = -19

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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