7.65x^2+2.77x=5.38

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Solution for 7.65x^2+2.77x=5.38 equation:


Simplifying
7.65x2 + 2.77x = 5.38

Reorder the terms:
2.77x + 7.65x2 = 5.38

Solving
2.77x + 7.65x2 = 5.38

Solving for variable 'x'.

Reorder the terms:
-5.38 + 2.77x + 7.65x2 = 5.38 + -5.38

Combine like terms: 5.38 + -5.38 = 0.00
-5.38 + 2.77x + 7.65x2 = 0.00

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

Divide each side by '7.65'.
-0.7032679739 + 0.3620915033x + x2 = 0

Move the constant term to the right:

Add '0.7032679739' to each side of the equation.
-0.7032679739 + 0.3620915033x + 0.7032679739 + x2 = 0 + 0.7032679739

Reorder the terms:
-0.7032679739 + 0.7032679739 + 0.3620915033x + x2 = 0 + 0.7032679739

Combine like terms: -0.7032679739 + 0.7032679739 = 0.0000000000
0.0000000000 + 0.3620915033x + x2 = 0 + 0.7032679739
0.3620915033x + x2 = 0 + 0.7032679739

Combine like terms: 0 + 0.7032679739 = 0.7032679739
0.3620915033x + x2 = 0.7032679739

The x term is 0.3620915033x.  Take half its coefficient (0.1810457517).
Square it (0.03277756421) and add it to both sides.

Add '0.03277756421' to each side of the equation.
0.3620915033x + 0.03277756421 + x2 = 0.7032679739 + 0.03277756421

Reorder the terms:
0.03277756421 + 0.3620915033x + x2 = 0.7032679739 + 0.03277756421

Combine like terms: 0.7032679739 + 0.03277756421 = 0.73604553811
0.03277756421 + 0.3620915033x + x2 = 0.73604553811

Factor a perfect square on the left side:
(x + 0.1810457517)(x + 0.1810457517) = 0.73604553811

Calculate the square root of the right side: 0.857930963

Break this problem into two subproblems by setting 
(x + 0.1810457517) equal to 0.857930963 and -0.857930963.

Subproblem 1

x + 0.1810457517 = 0.857930963 Simplifying x + 0.1810457517 = 0.857930963 Reorder the terms: 0.1810457517 + x = 0.857930963 Solving 0.1810457517 + x = 0.857930963 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1810457517' to each side of the equation. 0.1810457517 + -0.1810457517 + x = 0.857930963 + -0.1810457517 Combine like terms: 0.1810457517 + -0.1810457517 = 0.0000000000 0.0000000000 + x = 0.857930963 + -0.1810457517 x = 0.857930963 + -0.1810457517 Combine like terms: 0.857930963 + -0.1810457517 = 0.6768852113 x = 0.6768852113 Simplifying x = 0.6768852113

Subproblem 2

x + 0.1810457517 = -0.857930963 Simplifying x + 0.1810457517 = -0.857930963 Reorder the terms: 0.1810457517 + x = -0.857930963 Solving 0.1810457517 + x = -0.857930963 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1810457517' to each side of the equation. 0.1810457517 + -0.1810457517 + x = -0.857930963 + -0.1810457517 Combine like terms: 0.1810457517 + -0.1810457517 = 0.0000000000 0.0000000000 + x = -0.857930963 + -0.1810457517 x = -0.857930963 + -0.1810457517 Combine like terms: -0.857930963 + -0.1810457517 = -1.0389767147 x = -1.0389767147 Simplifying x = -1.0389767147

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6768852113, -1.0389767147}

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