(8x)(8x)+10x-7=0

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Solution for (8x)(8x)+10x-7=0 equation:


Simplifying
(8x)(8x) + 10x + -7 = 0

Remove parenthesis around (8x)
8x(8x) + 10x + -7 = 0

Remove parenthesis around (8x)
8x * 8x + 10x + -7 = 0

Reorder the terms for easier multiplication:
8 * 8x * x + 10x + -7 = 0

Multiply 8 * 8
64x * x + 10x + -7 = 0

Multiply x * x
64x2 + 10x + -7 = 0

Reorder the terms:
-7 + 10x + 64x2 = 0

Solving
-7 + 10x + 64x2 = 0

Solving for variable 'x'.

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

Divide each side by '64'.
-0.109375 + 0.15625x + x2 = 0

Move the constant term to the right:

Add '0.109375' to each side of the equation.
-0.109375 + 0.15625x + 0.109375 + x2 = 0 + 0.109375

Reorder the terms:
-0.109375 + 0.109375 + 0.15625x + x2 = 0 + 0.109375

Combine like terms: -0.109375 + 0.109375 = 0.000000
0.000000 + 0.15625x + x2 = 0 + 0.109375
0.15625x + x2 = 0 + 0.109375

Combine like terms: 0 + 0.109375 = 0.109375
0.15625x + x2 = 0.109375

The x term is 0.15625x.  Take half its coefficient (0.078125).
Square it (0.006103515625) and add it to both sides.

Add '0.006103515625' to each side of the equation.
0.15625x + 0.006103515625 + x2 = 0.109375 + 0.006103515625

Reorder the terms:
0.006103515625 + 0.15625x + x2 = 0.109375 + 0.006103515625

Combine like terms: 0.109375 + 0.006103515625 = 0.115478515625
0.006103515625 + 0.15625x + x2 = 0.115478515625

Factor a perfect square on the left side:
(x + 0.078125)(x + 0.078125) = 0.115478515625

Calculate the square root of the right side: 0.3398213

Break this problem into two subproblems by setting 
(x + 0.078125) equal to 0.3398213 and -0.3398213.

Subproblem 1

x + 0.078125 = 0.3398213 Simplifying x + 0.078125 = 0.3398213 Reorder the terms: 0.078125 + x = 0.3398213 Solving 0.078125 + x = 0.3398213 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.078125' to each side of the equation. 0.078125 + -0.078125 + x = 0.3398213 + -0.078125 Combine like terms: 0.078125 + -0.078125 = 0.000000 0.000000 + x = 0.3398213 + -0.078125 x = 0.3398213 + -0.078125 Combine like terms: 0.3398213 + -0.078125 = 0.2616963 x = 0.2616963 Simplifying x = 0.2616963

Subproblem 2

x + 0.078125 = -0.3398213 Simplifying x + 0.078125 = -0.3398213 Reorder the terms: 0.078125 + x = -0.3398213 Solving 0.078125 + x = -0.3398213 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.078125' to each side of the equation. 0.078125 + -0.078125 + x = -0.3398213 + -0.078125 Combine like terms: 0.078125 + -0.078125 = 0.000000 0.000000 + x = -0.3398213 + -0.078125 x = -0.3398213 + -0.078125 Combine like terms: -0.3398213 + -0.078125 = -0.4179463 x = -0.4179463 Simplifying x = -0.4179463

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2616963, -0.4179463}

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