49x^2-15=4x

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Solution for 49x^2-15=4x equation:


Simplifying
49x2 + -15 = 4x

Reorder the terms:
-15 + 49x2 = 4x

Solving
-15 + 49x2 = 4x

Solving for variable 'x'.

Reorder the terms:
-15 + -4x + 49x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-15 + -4x + 49x2 = 0

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

Divide each side by '49'.
-0.306122449 + -0.08163265306x + x2 = 0

Move the constant term to the right:

Add '0.306122449' to each side of the equation.
-0.306122449 + -0.08163265306x + 0.306122449 + x2 = 0 + 0.306122449

Reorder the terms:
-0.306122449 + 0.306122449 + -0.08163265306x + x2 = 0 + 0.306122449

Combine like terms: -0.306122449 + 0.306122449 = 0.000000000
0.000000000 + -0.08163265306x + x2 = 0 + 0.306122449
-0.08163265306x + x2 = 0 + 0.306122449

Combine like terms: 0 + 0.306122449 = 0.306122449
-0.08163265306x + x2 = 0.306122449

The x term is -0.08163265306x.  Take half its coefficient (-0.04081632653).
Square it (0.001665972511) and add it to both sides.

Add '0.001665972511' to each side of the equation.
-0.08163265306x + 0.001665972511 + x2 = 0.306122449 + 0.001665972511

Reorder the terms:
0.001665972511 + -0.08163265306x + x2 = 0.306122449 + 0.001665972511

Combine like terms: 0.306122449 + 0.001665972511 = 0.307788421511
0.001665972511 + -0.08163265306x + x2 = 0.307788421511

Factor a perfect square on the left side:
(x + -0.04081632653)(x + -0.04081632653) = 0.307788421511

Calculate the square root of the right side: 0.554786825

Break this problem into two subproblems by setting 
(x + -0.04081632653) equal to 0.554786825 and -0.554786825.

Subproblem 1

x + -0.04081632653 = 0.554786825 Simplifying x + -0.04081632653 = 0.554786825 Reorder the terms: -0.04081632653 + x = 0.554786825 Solving -0.04081632653 + x = 0.554786825 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.04081632653' to each side of the equation. -0.04081632653 + 0.04081632653 + x = 0.554786825 + 0.04081632653 Combine like terms: -0.04081632653 + 0.04081632653 = 0.00000000000 0.00000000000 + x = 0.554786825 + 0.04081632653 x = 0.554786825 + 0.04081632653 Combine like terms: 0.554786825 + 0.04081632653 = 0.59560315153 x = 0.59560315153 Simplifying x = 0.59560315153

Subproblem 2

x + -0.04081632653 = -0.554786825 Simplifying x + -0.04081632653 = -0.554786825 Reorder the terms: -0.04081632653 + x = -0.554786825 Solving -0.04081632653 + x = -0.554786825 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.04081632653' to each side of the equation. -0.04081632653 + 0.04081632653 + x = -0.554786825 + 0.04081632653 Combine like terms: -0.04081632653 + 0.04081632653 = 0.00000000000 0.00000000000 + x = -0.554786825 + 0.04081632653 x = -0.554786825 + 0.04081632653 Combine like terms: -0.554786825 + 0.04081632653 = -0.51397049847 x = -0.51397049847 Simplifying x = -0.51397049847

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.59560315153, -0.51397049847}

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