2x(8x-7)=-5(-5x+1)

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Solution for 2x(8x-7)=-5(-5x+1) equation:


Simplifying
2x(8x + -7) = -5(-5x + 1)

Reorder the terms:
2x(-7 + 8x) = -5(-5x + 1)
(-7 * 2x + 8x * 2x) = -5(-5x + 1)
(-14x + 16x2) = -5(-5x + 1)

Reorder the terms:
-14x + 16x2 = -5(1 + -5x)
-14x + 16x2 = (1 * -5 + -5x * -5)
-14x + 16x2 = (-5 + 25x)

Solving
-14x + 16x2 = -5 + 25x

Solving for variable 'x'.

Reorder the terms:
5 + -14x + -25x + 16x2 = -5 + 25x + 5 + -25x

Combine like terms: -14x + -25x = -39x
5 + -39x + 16x2 = -5 + 25x + 5 + -25x

Reorder the terms:
5 + -39x + 16x2 = -5 + 5 + 25x + -25x

Combine like terms: -5 + 5 = 0
5 + -39x + 16x2 = 0 + 25x + -25x
5 + -39x + 16x2 = 25x + -25x

Combine like terms: 25x + -25x = 0
5 + -39x + 16x2 = 0

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

Divide each side by '16'.
0.3125 + -2.4375x + x2 = 0

Move the constant term to the right:

Add '-0.3125' to each side of the equation.
0.3125 + -2.4375x + -0.3125 + x2 = 0 + -0.3125

Reorder the terms:
0.3125 + -0.3125 + -2.4375x + x2 = 0 + -0.3125

Combine like terms: 0.3125 + -0.3125 = 0.0000
0.0000 + -2.4375x + x2 = 0 + -0.3125
-2.4375x + x2 = 0 + -0.3125

Combine like terms: 0 + -0.3125 = -0.3125
-2.4375x + x2 = -0.3125

The x term is -2.4375x.  Take half its coefficient (-1.21875).
Square it (1.485351563) and add it to both sides.

Add '1.485351563' to each side of the equation.
-2.4375x + 1.485351563 + x2 = -0.3125 + 1.485351563

Reorder the terms:
1.485351563 + -2.4375x + x2 = -0.3125 + 1.485351563

Combine like terms: -0.3125 + 1.485351563 = 1.172851563
1.485351563 + -2.4375x + x2 = 1.172851563

Factor a perfect square on the left side:
(x + -1.21875)(x + -1.21875) = 1.172851563

Calculate the square root of the right side: 1.082982716

Break this problem into two subproblems by setting 
(x + -1.21875) equal to 1.082982716 and -1.082982716.

Subproblem 1

x + -1.21875 = 1.082982716 Simplifying x + -1.21875 = 1.082982716 Reorder the terms: -1.21875 + x = 1.082982716 Solving -1.21875 + x = 1.082982716 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.21875' to each side of the equation. -1.21875 + 1.21875 + x = 1.082982716 + 1.21875 Combine like terms: -1.21875 + 1.21875 = 0.00000 0.00000 + x = 1.082982716 + 1.21875 x = 1.082982716 + 1.21875 Combine like terms: 1.082982716 + 1.21875 = 2.301732716 x = 2.301732716 Simplifying x = 2.301732716

Subproblem 2

x + -1.21875 = -1.082982716 Simplifying x + -1.21875 = -1.082982716 Reorder the terms: -1.21875 + x = -1.082982716 Solving -1.21875 + x = -1.082982716 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.21875' to each side of the equation. -1.21875 + 1.21875 + x = -1.082982716 + 1.21875 Combine like terms: -1.21875 + 1.21875 = 0.00000 0.00000 + x = -1.082982716 + 1.21875 x = -1.082982716 + 1.21875 Combine like terms: -1.082982716 + 1.21875 = 0.135767284 x = 0.135767284 Simplifying x = 0.135767284

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.301732716, 0.135767284}

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