7x*5x-1=12*2x+2

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Solution for 7x*5x-1=12*2x+2 equation:


Simplifying
7x * 5x + -1 = 12 * 2x + 2

Reorder the terms for easier multiplication:
7 * 5x * x + -1 = 12 * 2x + 2

Multiply 7 * 5
35x * x + -1 = 12 * 2x + 2

Multiply x * x
35x2 + -1 = 12 * 2x + 2

Reorder the terms:
-1 + 35x2 = 12 * 2x + 2

Multiply 12 * 2
-1 + 35x2 = 24x + 2

Reorder the terms:
-1 + 35x2 = 2 + 24x

Solving
-1 + 35x2 = 2 + 24x

Solving for variable 'x'.

Reorder the terms:
-1 + -2 + -24x + 35x2 = 2 + 24x + -2 + -24x

Combine like terms: -1 + -2 = -3
-3 + -24x + 35x2 = 2 + 24x + -2 + -24x

Reorder the terms:
-3 + -24x + 35x2 = 2 + -2 + 24x + -24x

Combine like terms: 2 + -2 = 0
-3 + -24x + 35x2 = 0 + 24x + -24x
-3 + -24x + 35x2 = 24x + -24x

Combine like terms: 24x + -24x = 0
-3 + -24x + 35x2 = 0

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

Divide each side by '35'.
-0.08571428571 + -0.6857142857x + x2 = 0

Move the constant term to the right:

Add '0.08571428571' to each side of the equation.
-0.08571428571 + -0.6857142857x + 0.08571428571 + x2 = 0 + 0.08571428571

Reorder the terms:
-0.08571428571 + 0.08571428571 + -0.6857142857x + x2 = 0 + 0.08571428571

Combine like terms: -0.08571428571 + 0.08571428571 = 0.00000000000
0.00000000000 + -0.6857142857x + x2 = 0 + 0.08571428571
-0.6857142857x + x2 = 0 + 0.08571428571

Combine like terms: 0 + 0.08571428571 = 0.08571428571
-0.6857142857x + x2 = 0.08571428571

The x term is -0.6857142857x.  Take half its coefficient (-0.3428571429).
Square it (0.1175510204) and add it to both sides.

Add '0.1175510204' to each side of the equation.
-0.6857142857x + 0.1175510204 + x2 = 0.08571428571 + 0.1175510204

Reorder the terms:
0.1175510204 + -0.6857142857x + x2 = 0.08571428571 + 0.1175510204

Combine like terms: 0.08571428571 + 0.1175510204 = 0.20326530611
0.1175510204 + -0.6857142857x + x2 = 0.20326530611

Factor a perfect square on the left side:
(x + -0.3428571429)(x + -0.3428571429) = 0.20326530611

Calculate the square root of the right side: 0.450849538

Break this problem into two subproblems by setting 
(x + -0.3428571429) equal to 0.450849538 and -0.450849538.

Subproblem 1

x + -0.3428571429 = 0.450849538 Simplifying x + -0.3428571429 = 0.450849538 Reorder the terms: -0.3428571429 + x = 0.450849538 Solving -0.3428571429 + x = 0.450849538 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3428571429' to each side of the equation. -0.3428571429 + 0.3428571429 + x = 0.450849538 + 0.3428571429 Combine like terms: -0.3428571429 + 0.3428571429 = 0.0000000000 0.0000000000 + x = 0.450849538 + 0.3428571429 x = 0.450849538 + 0.3428571429 Combine like terms: 0.450849538 + 0.3428571429 = 0.7937066809 x = 0.7937066809 Simplifying x = 0.7937066809

Subproblem 2

x + -0.3428571429 = -0.450849538 Simplifying x + -0.3428571429 = -0.450849538 Reorder the terms: -0.3428571429 + x = -0.450849538 Solving -0.3428571429 + x = -0.450849538 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3428571429' to each side of the equation. -0.3428571429 + 0.3428571429 + x = -0.450849538 + 0.3428571429 Combine like terms: -0.3428571429 + 0.3428571429 = 0.0000000000 0.0000000000 + x = -0.450849538 + 0.3428571429 x = -0.450849538 + 0.3428571429 Combine like terms: -0.450849538 + 0.3428571429 = -0.1079923951 x = -0.1079923951 Simplifying x = -0.1079923951

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.7937066809, -0.1079923951}

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