x^2=8x-25

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Solution for x^2=8x-25 equation:


Simplifying
x2 = 8x + -25

Reorder the terms:
x2 = -25 + 8x

Solving
x2 = -25 + 8x

Solving for variable 'x'.

Reorder the terms:
25 + -8x + x2 = -25 + 8x + 25 + -8x

Reorder the terms:
25 + -8x + x2 = -25 + 25 + 8x + -8x

Combine like terms: -25 + 25 = 0
25 + -8x + x2 = 0 + 8x + -8x
25 + -8x + x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
25 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + -8x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + -8x + x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -8x + x2 = 0 + -25
-8x + x2 = 0 + -25

Combine like terms: 0 + -25 = -25
-8x + x2 = -25

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 = -25 + 16

Reorder the terms:
16 + -8x + x2 = -25 + 16

Combine like terms: -25 + 16 = -9
16 + -8x + x2 = -9

Factor a perfect square on the left side:
(x + -4)(x + -4) = -9

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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