5x^2-3x=135

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Solution for 5x^2-3x=135 equation:


Simplifying
5x2 + -3x = 135

Reorder the terms:
-3x + 5x2 = 135

Solving
-3x + 5x2 = 135

Solving for variable 'x'.

Reorder the terms:
-135 + -3x + 5x2 = 135 + -135

Combine like terms: 135 + -135 = 0
-135 + -3x + 5x2 = 0

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

Divide each side by '5'.
-27 + -0.6x + x2 = 0

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -0.6x + 27 + x2 = 0 + 27

Reorder the terms:
-27 + 27 + -0.6x + x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -0.6x + x2 = 0 + 27
-0.6x + x2 = 0 + 27

Combine like terms: 0 + 27 = 27
-0.6x + x2 = 27

The x term is -0.6x.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6x + 0.09 + x2 = 27 + 0.09

Reorder the terms:
0.09 + -0.6x + x2 = 27 + 0.09

Combine like terms: 27 + 0.09 = 27.09
0.09 + -0.6x + x2 = 27.09

Factor a perfect square on the left side:
(x + -0.3)(x + -0.3) = 27.09

Calculate the square root of the right side: 5.204805472

Break this problem into two subproblems by setting 
(x + -0.3) equal to 5.204805472 and -5.204805472.

Subproblem 1

x + -0.3 = 5.204805472 Simplifying x + -0.3 = 5.204805472 Reorder the terms: -0.3 + x = 5.204805472 Solving -0.3 + x = 5.204805472 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = 5.204805472 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = 5.204805472 + 0.3 x = 5.204805472 + 0.3 Combine like terms: 5.204805472 + 0.3 = 5.504805472 x = 5.504805472 Simplifying x = 5.504805472

Subproblem 2

x + -0.3 = -5.204805472 Simplifying x + -0.3 = -5.204805472 Reorder the terms: -0.3 + x = -5.204805472 Solving -0.3 + x = -5.204805472 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = -5.204805472 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = -5.204805472 + 0.3 x = -5.204805472 + 0.3 Combine like terms: -5.204805472 + 0.3 = -4.904805472 x = -4.904805472 Simplifying x = -4.904805472

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.504805472, -4.904805472}

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