7x^2-56x+16=0

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Solution for 7x^2-56x+16=0 equation:


Simplifying
7x2 + -56x + 16 = 0

Reorder the terms:
16 + -56x + 7x2 = 0

Solving
16 + -56x + 7x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
7 the coefficient of the squared term: 

Divide each side by '7'.
2.285714286 + -8x + x2 = 0

Move the constant term to the right:

Add '-2.285714286' to each side of the equation.
2.285714286 + -8x + -2.285714286 + x2 = 0 + -2.285714286

Reorder the terms:
2.285714286 + -2.285714286 + -8x + x2 = 0 + -2.285714286

Combine like terms: 2.285714286 + -2.285714286 = 0.000000000
0.000000000 + -8x + x2 = 0 + -2.285714286
-8x + x2 = 0 + -2.285714286

Combine like terms: 0 + -2.285714286 = -2.285714286
-8x + x2 = -2.285714286

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 = -2.285714286 + 16

Reorder the terms:
16 + -8x + x2 = -2.285714286 + 16

Combine like terms: -2.285714286 + 16 = 13.714285714
16 + -8x + x2 = 13.714285714

Factor a perfect square on the left side:
(x + -4)(x + -4) = 13.714285714

Calculate the square root of the right side: 3.703280399

Break this problem into two subproblems by setting 
(x + -4) equal to 3.703280399 and -3.703280399.

Subproblem 1

x + -4 = 3.703280399 Simplifying x + -4 = 3.703280399 Reorder the terms: -4 + x = 3.703280399 Solving -4 + x = 3.703280399 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 = 3.703280399 + 4 Combine like terms: -4 + 4 = 0 0 + x = 3.703280399 + 4 x = 3.703280399 + 4 Combine like terms: 3.703280399 + 4 = 7.703280399 x = 7.703280399 Simplifying x = 7.703280399

Subproblem 2

x + -4 = -3.703280399 Simplifying x + -4 = -3.703280399 Reorder the terms: -4 + x = -3.703280399 Solving -4 + x = -3.703280399 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 = -3.703280399 + 4 Combine like terms: -4 + 4 = 0 0 + x = -3.703280399 + 4 x = -3.703280399 + 4 Combine like terms: -3.703280399 + 4 = 0.296719601 x = 0.296719601 Simplifying x = 0.296719601

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.703280399, 0.296719601}

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