15x^2+4x+3=30x^2+5x

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Solution for 15x^2+4x+3=30x^2+5x equation:


Simplifying
15x2 + 4x + 3 = 30x2 + 5x

Reorder the terms:
3 + 4x + 15x2 = 30x2 + 5x

Reorder the terms:
3 + 4x + 15x2 = 5x + 30x2

Solving
3 + 4x + 15x2 = 5x + 30x2

Solving for variable 'x'.

Reorder the terms:
3 + 4x + -5x + 15x2 + -30x2 = 5x + 30x2 + -5x + -30x2

Combine like terms: 4x + -5x = -1x
3 + -1x + 15x2 + -30x2 = 5x + 30x2 + -5x + -30x2

Combine like terms: 15x2 + -30x2 = -15x2
3 + -1x + -15x2 = 5x + 30x2 + -5x + -30x2

Reorder the terms:
3 + -1x + -15x2 = 5x + -5x + 30x2 + -30x2

Combine like terms: 5x + -5x = 0
3 + -1x + -15x2 = 0 + 30x2 + -30x2
3 + -1x + -15x2 = 30x2 + -30x2

Combine like terms: 30x2 + -30x2 = 0
3 + -1x + -15x2 = 0

Begin completing the square.  Divide all terms by
-15 the coefficient of the squared term: 

Divide each side by '-15'.
-0.2 + 0.06666666667x + x2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + 0.06666666667x + 0.2 + x2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + 0.06666666667x + x2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + 0.06666666667x + x2 = 0 + 0.2
0.06666666667x + x2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
0.06666666667x + x2 = 0.2

The x term is 0.06666666667x.  Take half its coefficient (0.03333333334).
Square it (0.001111111112) and add it to both sides.

Add '0.001111111112' to each side of the equation.
0.06666666667x + 0.001111111112 + x2 = 0.2 + 0.001111111112

Reorder the terms:
0.001111111112 + 0.06666666667x + x2 = 0.2 + 0.001111111112

Combine like terms: 0.2 + 0.001111111112 = 0.201111111112
0.001111111112 + 0.06666666667x + x2 = 0.201111111112

Factor a perfect square on the left side:
(x + 0.03333333334)(x + 0.03333333334) = 0.201111111112

Calculate the square root of the right side: 0.448454135

Break this problem into two subproblems by setting 
(x + 0.03333333334) equal to 0.448454135 and -0.448454135.

Subproblem 1

x + 0.03333333334 = 0.448454135 Simplifying x + 0.03333333334 = 0.448454135 Reorder the terms: 0.03333333334 + x = 0.448454135 Solving 0.03333333334 + x = 0.448454135 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03333333334' to each side of the equation. 0.03333333334 + -0.03333333334 + x = 0.448454135 + -0.03333333334 Combine like terms: 0.03333333334 + -0.03333333334 = 0.00000000000 0.00000000000 + x = 0.448454135 + -0.03333333334 x = 0.448454135 + -0.03333333334 Combine like terms: 0.448454135 + -0.03333333334 = 0.41512080166 x = 0.41512080166 Simplifying x = 0.41512080166

Subproblem 2

x + 0.03333333334 = -0.448454135 Simplifying x + 0.03333333334 = -0.448454135 Reorder the terms: 0.03333333334 + x = -0.448454135 Solving 0.03333333334 + x = -0.448454135 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03333333334' to each side of the equation. 0.03333333334 + -0.03333333334 + x = -0.448454135 + -0.03333333334 Combine like terms: 0.03333333334 + -0.03333333334 = 0.00000000000 0.00000000000 + x = -0.448454135 + -0.03333333334 x = -0.448454135 + -0.03333333334 Combine like terms: -0.448454135 + -0.03333333334 = -0.48178746834 x = -0.48178746834 Simplifying x = -0.48178746834

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.41512080166, -0.48178746834}

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