8c*8c+26c-7=0

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Solution for 8c*8c+26c-7=0 equation:


Simplifying
8c * 8c + 26c + -7 = 0

Reorder the terms for easier multiplication:
8 * 8c * c + 26c + -7 = 0

Multiply 8 * 8
64c * c + 26c + -7 = 0

Multiply c * c
64c2 + 26c + -7 = 0

Reorder the terms:
-7 + 26c + 64c2 = 0

Solving
-7 + 26c + 64c2 = 0

Solving for variable 'c'.

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

Divide each side by '64'.
-0.109375 + 0.40625c + c2 = 0

Move the constant term to the right:

Add '0.109375' to each side of the equation.
-0.109375 + 0.40625c + 0.109375 + c2 = 0 + 0.109375

Reorder the terms:
-0.109375 + 0.109375 + 0.40625c + c2 = 0 + 0.109375

Combine like terms: -0.109375 + 0.109375 = 0.000000
0.000000 + 0.40625c + c2 = 0 + 0.109375
0.40625c + c2 = 0 + 0.109375

Combine like terms: 0 + 0.109375 = 0.109375
0.40625c + c2 = 0.109375

The c term is 0.40625c.  Take half its coefficient (0.203125).
Square it (0.04125976563) and add it to both sides.

Add '0.04125976563' to each side of the equation.
0.40625c + 0.04125976563 + c2 = 0.109375 + 0.04125976563

Reorder the terms:
0.04125976563 + 0.40625c + c2 = 0.109375 + 0.04125976563

Combine like terms: 0.109375 + 0.04125976563 = 0.15063476563
0.04125976563 + 0.40625c + c2 = 0.15063476563

Factor a perfect square on the left side:
(c + 0.203125)(c + 0.203125) = 0.15063476563

Calculate the square root of the right side: 0.388116948

Break this problem into two subproblems by setting 
(c + 0.203125) equal to 0.388116948 and -0.388116948.

Subproblem 1

c + 0.203125 = 0.388116948 Simplifying c + 0.203125 = 0.388116948 Reorder the terms: 0.203125 + c = 0.388116948 Solving 0.203125 + c = 0.388116948 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.203125' to each side of the equation. 0.203125 + -0.203125 + c = 0.388116948 + -0.203125 Combine like terms: 0.203125 + -0.203125 = 0.000000 0.000000 + c = 0.388116948 + -0.203125 c = 0.388116948 + -0.203125 Combine like terms: 0.388116948 + -0.203125 = 0.184991948 c = 0.184991948 Simplifying c = 0.184991948

Subproblem 2

c + 0.203125 = -0.388116948 Simplifying c + 0.203125 = -0.388116948 Reorder the terms: 0.203125 + c = -0.388116948 Solving 0.203125 + c = -0.388116948 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.203125' to each side of the equation. 0.203125 + -0.203125 + c = -0.388116948 + -0.203125 Combine like terms: 0.203125 + -0.203125 = 0.000000 0.000000 + c = -0.388116948 + -0.203125 c = -0.388116948 + -0.203125 Combine like terms: -0.388116948 + -0.203125 = -0.591241948 c = -0.591241948 Simplifying c = -0.591241948

Solution

The solution to the problem is based on the solutions from the subproblems. c = {0.184991948, -0.591241948}

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