8x^2+2x=35

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Solution for 8x^2+2x=35 equation:


Simplifying
8x2 + 2x = 35

Reorder the terms:
2x + 8x2 = 35

Solving
2x + 8x2 = 35

Solving for variable 'x'.

Reorder the terms:
-35 + 2x + 8x2 = 35 + -35

Combine like terms: 35 + -35 = 0
-35 + 2x + 8x2 = 0

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

Divide each side by '8'.
-4.375 + 0.25x + x2 = 0

Move the constant term to the right:

Add '4.375' to each side of the equation.
-4.375 + 0.25x + 4.375 + x2 = 0 + 4.375

Reorder the terms:
-4.375 + 4.375 + 0.25x + x2 = 0 + 4.375

Combine like terms: -4.375 + 4.375 = 0.000
0.000 + 0.25x + x2 = 0 + 4.375
0.25x + x2 = 0 + 4.375

Combine like terms: 0 + 4.375 = 4.375
0.25x + x2 = 4.375

The x term is 0.25x.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25x + 0.015625 + x2 = 4.375 + 0.015625

Reorder the terms:
0.015625 + 0.25x + x2 = 4.375 + 0.015625

Combine like terms: 4.375 + 0.015625 = 4.390625
0.015625 + 0.25x + x2 = 4.390625

Factor a perfect square on the left side:
(x + 0.125)(x + 0.125) = 4.390625

Calculate the square root of the right side: 2.095381827

Break this problem into two subproblems by setting 
(x + 0.125) equal to 2.095381827 and -2.095381827.

Subproblem 1

x + 0.125 = 2.095381827 Simplifying x + 0.125 = 2.095381827 Reorder the terms: 0.125 + x = 2.095381827 Solving 0.125 + x = 2.095381827 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = 2.095381827 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = 2.095381827 + -0.125 x = 2.095381827 + -0.125 Combine like terms: 2.095381827 + -0.125 = 1.970381827 x = 1.970381827 Simplifying x = 1.970381827

Subproblem 2

x + 0.125 = -2.095381827 Simplifying x + 0.125 = -2.095381827 Reorder the terms: 0.125 + x = -2.095381827 Solving 0.125 + x = -2.095381827 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = -2.095381827 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = -2.095381827 + -0.125 x = -2.095381827 + -0.125 Combine like terms: -2.095381827 + -0.125 = -2.220381827 x = -2.220381827 Simplifying x = -2.220381827

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.970381827, -2.220381827}

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