x^2-8x+0.5625=0

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Solution for x^2-8x+0.5625=0 equation:


Simplifying
x2 + -8x + 0.5625 = 0

Reorder the terms:
0.5625 + -8x + x2 = 0

Solving
0.5625 + -8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.5625' to each side of the equation.
0.5625 + -8x + -0.5625 + x2 = 0 + -0.5625

Reorder the terms:
0.5625 + -0.5625 + -8x + x2 = 0 + -0.5625

Combine like terms: 0.5625 + -0.5625 = 0.0000
0.0000 + -8x + x2 = 0 + -0.5625
-8x + x2 = 0 + -0.5625

Combine like terms: 0 + -0.5625 = -0.5625
-8x + x2 = -0.5625

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 = -0.5625 + 16

Reorder the terms:
16 + -8x + x2 = -0.5625 + 16

Combine like terms: -0.5625 + 16 = 15.4375
16 + -8x + x2 = 15.4375

Factor a perfect square on the left side:
(x + -4)(x + -4) = 15.4375

Calculate the square root of the right side: 3.929058411

Break this problem into two subproblems by setting 
(x + -4) equal to 3.929058411 and -3.929058411.

Subproblem 1

x + -4 = 3.929058411 Simplifying x + -4 = 3.929058411 Reorder the terms: -4 + x = 3.929058411 Solving -4 + x = 3.929058411 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 3.929058411 + 4 Combine like terms: -4 + 4 = 0 0 + x = 3.929058411 + 4 x = 3.929058411 + 4 Combine like terms: 3.929058411 + 4 = 7.929058411 x = 7.929058411 Simplifying x = 7.929058411

Subproblem 2

x + -4 = -3.929058411 Simplifying x + -4 = -3.929058411 Reorder the terms: -4 + x = -3.929058411 Solving -4 + x = -3.929058411 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -3.929058411 + 4 Combine like terms: -4 + 4 = 0 0 + x = -3.929058411 + 4 x = -3.929058411 + 4 Combine like terms: -3.929058411 + 4 = 0.070941589 x = 0.070941589 Simplifying x = 0.070941589

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.929058411, 0.070941589}

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