19x-15=2x^2

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Solution for 19x-15=2x^2 equation:


Simplifying
19x + -15 = 2x2

Reorder the terms:
-15 + 19x = 2x2

Solving
-15 + 19x = 2x2

Solving for variable 'x'.

Combine like terms: 2x2 + -2x2 = 0
-15 + 19x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
7.5 + -9.5x + x2 = 0

Move the constant term to the right:

Add '-7.5' to each side of the equation.
7.5 + -9.5x + -7.5 + x2 = 0 + -7.5

Reorder the terms:
7.5 + -7.5 + -9.5x + x2 = 0 + -7.5

Combine like terms: 7.5 + -7.5 = 0.0
0.0 + -9.5x + x2 = 0 + -7.5
-9.5x + x2 = 0 + -7.5

Combine like terms: 0 + -7.5 = -7.5
-9.5x + x2 = -7.5

The x term is -9.5x.  Take half its coefficient (-4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
-9.5x + 22.5625 + x2 = -7.5 + 22.5625

Reorder the terms:
22.5625 + -9.5x + x2 = -7.5 + 22.5625

Combine like terms: -7.5 + 22.5625 = 15.0625
22.5625 + -9.5x + x2 = 15.0625

Factor a perfect square on the left side:
(x + -4.75)(x + -4.75) = 15.0625

Calculate the square root of the right side: 3.881043674

Break this problem into two subproblems by setting 
(x + -4.75) equal to 3.881043674 and -3.881043674.

Subproblem 1

x + -4.75 = 3.881043674 Simplifying x + -4.75 = 3.881043674 Reorder the terms: -4.75 + x = 3.881043674 Solving -4.75 + x = 3.881043674 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = 3.881043674 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = 3.881043674 + 4.75 x = 3.881043674 + 4.75 Combine like terms: 3.881043674 + 4.75 = 8.631043674 x = 8.631043674 Simplifying x = 8.631043674

Subproblem 2

x + -4.75 = -3.881043674 Simplifying x + -4.75 = -3.881043674 Reorder the terms: -4.75 + x = -3.881043674 Solving -4.75 + x = -3.881043674 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = -3.881043674 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = -3.881043674 + 4.75 x = -3.881043674 + 4.75 Combine like terms: -3.881043674 + 4.75 = 0.868956326 x = 0.868956326 Simplifying x = 0.868956326

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.631043674, 0.868956326}

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