8.16x^2+3.42x=5.93

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Solution for 8.16x^2+3.42x=5.93 equation:


Simplifying
8.16x2 + 3.42x = 5.93

Reorder the terms:
3.42x + 8.16x2 = 5.93

Solving
3.42x + 8.16x2 = 5.93

Solving for variable 'x'.

Reorder the terms:
-5.93 + 3.42x + 8.16x2 = 5.93 + -5.93

Combine like terms: 5.93 + -5.93 = 0.00
-5.93 + 3.42x + 8.16x2 = 0.00

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

Divide each side by '8.16'.
-0.7267156863 + 0.4191176471x + x2 = 0

Move the constant term to the right:

Add '0.7267156863' to each side of the equation.
-0.7267156863 + 0.4191176471x + 0.7267156863 + x2 = 0 + 0.7267156863

Reorder the terms:
-0.7267156863 + 0.7267156863 + 0.4191176471x + x2 = 0 + 0.7267156863

Combine like terms: -0.7267156863 + 0.7267156863 = 0.0000000000
0.0000000000 + 0.4191176471x + x2 = 0 + 0.7267156863
0.4191176471x + x2 = 0 + 0.7267156863

Combine like terms: 0 + 0.7267156863 = 0.7267156863
0.4191176471x + x2 = 0.7267156863

The x term is 0.4191176471x.  Take half its coefficient (0.2095588236).
Square it (0.04391490055) and add it to both sides.

Add '0.04391490055' to each side of the equation.
0.4191176471x + 0.04391490055 + x2 = 0.7267156863 + 0.04391490055

Reorder the terms:
0.04391490055 + 0.4191176471x + x2 = 0.7267156863 + 0.04391490055

Combine like terms: 0.7267156863 + 0.04391490055 = 0.77063058685
0.04391490055 + 0.4191176471x + x2 = 0.77063058685

Factor a perfect square on the left side:
(x + 0.2095588236)(x + 0.2095588236) = 0.77063058685

Calculate the square root of the right side: 0.877855675

Break this problem into two subproblems by setting 
(x + 0.2095588236) equal to 0.877855675 and -0.877855675.

Subproblem 1

x + 0.2095588236 = 0.877855675 Simplifying x + 0.2095588236 = 0.877855675 Reorder the terms: 0.2095588236 + x = 0.877855675 Solving 0.2095588236 + x = 0.877855675 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2095588236' to each side of the equation. 0.2095588236 + -0.2095588236 + x = 0.877855675 + -0.2095588236 Combine like terms: 0.2095588236 + -0.2095588236 = 0.0000000000 0.0000000000 + x = 0.877855675 + -0.2095588236 x = 0.877855675 + -0.2095588236 Combine like terms: 0.877855675 + -0.2095588236 = 0.6682968514 x = 0.6682968514 Simplifying x = 0.6682968514

Subproblem 2

x + 0.2095588236 = -0.877855675 Simplifying x + 0.2095588236 = -0.877855675 Reorder the terms: 0.2095588236 + x = -0.877855675 Solving 0.2095588236 + x = -0.877855675 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2095588236' to each side of the equation. 0.2095588236 + -0.2095588236 + x = -0.877855675 + -0.2095588236 Combine like terms: 0.2095588236 + -0.2095588236 = 0.0000000000 0.0000000000 + x = -0.877855675 + -0.2095588236 x = -0.877855675 + -0.2095588236 Combine like terms: -0.877855675 + -0.2095588236 = -1.0874144986 x = -1.0874144986 Simplifying x = -1.0874144986

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6682968514, -1.0874144986}

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