2x^2=x+150

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Solution for 2x^2=x+150 equation:


Simplifying
2x2 = x + 150

Reorder the terms:
2x2 = 150 + x

Solving
2x2 = 150 + x

Solving for variable 'x'.

Reorder the terms:
-150 + -1x + 2x2 = 150 + x + -150 + -1x

Reorder the terms:
-150 + -1x + 2x2 = 150 + -150 + x + -1x

Combine like terms: 150 + -150 = 0
-150 + -1x + 2x2 = 0 + x + -1x
-150 + -1x + 2x2 = x + -1x

Combine like terms: x + -1x = 0
-150 + -1x + 2x2 = 0

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

Divide each side by '2'.
-75 + -0.5x + x2 = 0

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + -0.5x + 75 + x2 = 0 + 75

Reorder the terms:
-75 + 75 + -0.5x + x2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + -0.5x + x2 = 0 + 75
-0.5x + x2 = 0 + 75

Combine like terms: 0 + 75 = 75
-0.5x + x2 = 75

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 75 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 75 + 0.0625

Combine like terms: 75 + 0.0625 = 75.0625
0.0625 + -0.5x + x2 = 75.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 75.0625

Calculate the square root of the right side: 8.663861726

Break this problem into two subproblems by setting 
(x + -0.25) equal to 8.663861726 and -8.663861726.

Subproblem 1

x + -0.25 = 8.663861726 Simplifying x + -0.25 = 8.663861726 Reorder the terms: -0.25 + x = 8.663861726 Solving -0.25 + x = 8.663861726 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 8.663861726 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 8.663861726 + 0.25 x = 8.663861726 + 0.25 Combine like terms: 8.663861726 + 0.25 = 8.913861726 x = 8.913861726 Simplifying x = 8.913861726

Subproblem 2

x + -0.25 = -8.663861726 Simplifying x + -0.25 = -8.663861726 Reorder the terms: -0.25 + x = -8.663861726 Solving -0.25 + x = -8.663861726 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -8.663861726 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -8.663861726 + 0.25 x = -8.663861726 + 0.25 Combine like terms: -8.663861726 + 0.25 = -8.413861726 x = -8.413861726 Simplifying x = -8.413861726

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.913861726, -8.413861726}

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