243=4x^2-4x

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Solution for 243=4x^2-4x equation:


Simplifying
243 = 4x2 + -4x

Reorder the terms:
243 = -4x + 4x2

Solving
243 = -4x + 4x2

Solving for variable 'x'.

Reorder the terms:
243 + 4x + -4x2 = -4x + 4x + 4x2 + -4x2

Combine like terms: -4x + 4x = 0
243 + 4x + -4x2 = 0 + 4x2 + -4x2
243 + 4x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
243 + 4x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-60.75 + -1x + x2 = 0

Move the constant term to the right:

Add '60.75' to each side of the equation.
-60.75 + -1x + 60.75 + x2 = 0 + 60.75

Reorder the terms:
-60.75 + 60.75 + -1x + x2 = 0 + 60.75

Combine like terms: -60.75 + 60.75 = 0.00
0.00 + -1x + x2 = 0 + 60.75
-1x + x2 = 0 + 60.75

Combine like terms: 0 + 60.75 = 60.75
-1x + x2 = 60.75

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 60.75 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 60.75 + 0.25

Combine like terms: 60.75 + 0.25 = 61
0.25 + -1x + x2 = 61

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 61

Calculate the square root of the right side: 7.810249676

Break this problem into two subproblems by setting 
(x + -0.5) equal to 7.810249676 and -7.810249676.

Subproblem 1

x + -0.5 = 7.810249676 Simplifying x + -0.5 = 7.810249676 Reorder the terms: -0.5 + x = 7.810249676 Solving -0.5 + x = 7.810249676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 7.810249676 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 7.810249676 + 0.5 x = 7.810249676 + 0.5 Combine like terms: 7.810249676 + 0.5 = 8.310249676 x = 8.310249676 Simplifying x = 8.310249676

Subproblem 2

x + -0.5 = -7.810249676 Simplifying x + -0.5 = -7.810249676 Reorder the terms: -0.5 + x = -7.810249676 Solving -0.5 + x = -7.810249676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -7.810249676 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -7.810249676 + 0.5 x = -7.810249676 + 0.5 Combine like terms: -7.810249676 + 0.5 = -7.310249676 x = -7.310249676 Simplifying x = -7.310249676

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.310249676, -7.310249676}

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