5x(x-6)+2=7x-6

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Solution for 5x(x-6)+2=7x-6 equation:


Simplifying
5x(x + -6) + 2 = 7x + -6

Reorder the terms:
5x(-6 + x) + 2 = 7x + -6
(-6 * 5x + x * 5x) + 2 = 7x + -6
(-30x + 5x2) + 2 = 7x + -6

Reorder the terms:
2 + -30x + 5x2 = 7x + -6

Reorder the terms:
2 + -30x + 5x2 = -6 + 7x

Solving
2 + -30x + 5x2 = -6 + 7x

Solving for variable 'x'.

Reorder the terms:
2 + 6 + -30x + -7x + 5x2 = -6 + 7x + 6 + -7x

Combine like terms: 2 + 6 = 8
8 + -30x + -7x + 5x2 = -6 + 7x + 6 + -7x

Combine like terms: -30x + -7x = -37x
8 + -37x + 5x2 = -6 + 7x + 6 + -7x

Reorder the terms:
8 + -37x + 5x2 = -6 + 6 + 7x + -7x

Combine like terms: -6 + 6 = 0
8 + -37x + 5x2 = 0 + 7x + -7x
8 + -37x + 5x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
8 + -37x + 5x2 = 0

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

Divide each side by '5'.
1.6 + -7.4x + x2 = 0

Move the constant term to the right:

Add '-1.6' to each side of the equation.
1.6 + -7.4x + -1.6 + x2 = 0 + -1.6

Reorder the terms:
1.6 + -1.6 + -7.4x + x2 = 0 + -1.6

Combine like terms: 1.6 + -1.6 = 0.0
0.0 + -7.4x + x2 = 0 + -1.6
-7.4x + x2 = 0 + -1.6

Combine like terms: 0 + -1.6 = -1.6
-7.4x + x2 = -1.6

The x term is -7.4x.  Take half its coefficient (-3.7).
Square it (13.69) and add it to both sides.

Add '13.69' to each side of the equation.
-7.4x + 13.69 + x2 = -1.6 + 13.69

Reorder the terms:
13.69 + -7.4x + x2 = -1.6 + 13.69

Combine like terms: -1.6 + 13.69 = 12.09
13.69 + -7.4x + x2 = 12.09

Factor a perfect square on the left side:
(x + -3.7)(x + -3.7) = 12.09

Calculate the square root of the right side: 3.47706773

Break this problem into two subproblems by setting 
(x + -3.7) equal to 3.47706773 and -3.47706773.

Subproblem 1

x + -3.7 = 3.47706773 Simplifying x + -3.7 = 3.47706773 Reorder the terms: -3.7 + x = 3.47706773 Solving -3.7 + x = 3.47706773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.7' to each side of the equation. -3.7 + 3.7 + x = 3.47706773 + 3.7 Combine like terms: -3.7 + 3.7 = 0.0 0.0 + x = 3.47706773 + 3.7 x = 3.47706773 + 3.7 Combine like terms: 3.47706773 + 3.7 = 7.17706773 x = 7.17706773 Simplifying x = 7.17706773

Subproblem 2

x + -3.7 = -3.47706773 Simplifying x + -3.7 = -3.47706773 Reorder the terms: -3.7 + x = -3.47706773 Solving -3.7 + x = -3.47706773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.7' to each side of the equation. -3.7 + 3.7 + x = -3.47706773 + 3.7 Combine like terms: -3.7 + 3.7 = 0.0 0.0 + x = -3.47706773 + 3.7 x = -3.47706773 + 3.7 Combine like terms: -3.47706773 + 3.7 = 0.22293227 x = 0.22293227 Simplifying x = 0.22293227

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.17706773, 0.22293227}

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