3.14x^2=6x+12.88

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Solution for 3.14x^2=6x+12.88 equation:


Simplifying
3.14x2 = 6x + 12.88

Reorder the terms:
3.14x2 = 12.88 + 6x

Solving
3.14x2 = 12.88 + 6x

Solving for variable 'x'.

Reorder the terms:
-12.88 + -6x + 3.14x2 = 12.88 + 6x + -12.88 + -6x

Reorder the terms:
-12.88 + -6x + 3.14x2 = 12.88 + -12.88 + 6x + -6x

Combine like terms: 12.88 + -12.88 = 0.00
-12.88 + -6x + 3.14x2 = 0.00 + 6x + -6x
-12.88 + -6x + 3.14x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-12.88 + -6x + 3.14x2 = 0

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

Divide each side by '3.14'.
-4.101910828 + -1.910828025x + x2 = 0

Move the constant term to the right:

Add '4.101910828' to each side of the equation.
-4.101910828 + -1.910828025x + 4.101910828 + x2 = 0 + 4.101910828

Reorder the terms:
-4.101910828 + 4.101910828 + -1.910828025x + x2 = 0 + 4.101910828

Combine like terms: -4.101910828 + 4.101910828 = 0.000000000
0.000000000 + -1.910828025x + x2 = 0 + 4.101910828
-1.910828025x + x2 = 0 + 4.101910828

Combine like terms: 0 + 4.101910828 = 4.101910828
-1.910828025x + x2 = 4.101910828

The x term is -1.910828025x.  Take half its coefficient (-0.9554140125).
Square it (0.9128159353) and add it to both sides.

Add '0.9128159353' to each side of the equation.
-1.910828025x + 0.9128159353 + x2 = 4.101910828 + 0.9128159353

Reorder the terms:
0.9128159353 + -1.910828025x + x2 = 4.101910828 + 0.9128159353

Combine like terms: 4.101910828 + 0.9128159353 = 5.0147267633
0.9128159353 + -1.910828025x + x2 = 5.0147267633

Factor a perfect square on the left side:
(x + -0.9554140125)(x + -0.9554140125) = 5.0147267633

Calculate the square root of the right side: 2.239358561

Break this problem into two subproblems by setting 
(x + -0.9554140125) equal to 2.239358561 and -2.239358561.

Subproblem 1

x + -0.9554140125 = 2.239358561 Simplifying x + -0.9554140125 = 2.239358561 Reorder the terms: -0.9554140125 + x = 2.239358561 Solving -0.9554140125 + x = 2.239358561 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9554140125' to each side of the equation. -0.9554140125 + 0.9554140125 + x = 2.239358561 + 0.9554140125 Combine like terms: -0.9554140125 + 0.9554140125 = 0.0000000000 0.0000000000 + x = 2.239358561 + 0.9554140125 x = 2.239358561 + 0.9554140125 Combine like terms: 2.239358561 + 0.9554140125 = 3.1947725735 x = 3.1947725735 Simplifying x = 3.1947725735

Subproblem 2

x + -0.9554140125 = -2.239358561 Simplifying x + -0.9554140125 = -2.239358561 Reorder the terms: -0.9554140125 + x = -2.239358561 Solving -0.9554140125 + x = -2.239358561 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9554140125' to each side of the equation. -0.9554140125 + 0.9554140125 + x = -2.239358561 + 0.9554140125 Combine like terms: -0.9554140125 + 0.9554140125 = 0.0000000000 0.0000000000 + x = -2.239358561 + 0.9554140125 x = -2.239358561 + 0.9554140125 Combine like terms: -2.239358561 + 0.9554140125 = -1.2839445485 x = -1.2839445485 Simplifying x = -1.2839445485

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.1947725735, -1.2839445485}

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