4x^2-5x=150

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Solution for 4x^2-5x=150 equation:


Simplifying
4x2 + -5x = 150

Reorder the terms:
-5x + 4x2 = 150

Solving
-5x + 4x2 = 150

Solving for variable 'x'.

Reorder the terms:
-150 + -5x + 4x2 = 150 + -150

Combine like terms: 150 + -150 = 0
-150 + -5x + 4x2 = 0

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

Divide each side by '4'.
-37.5 + -1.25x + x2 = 0

Move the constant term to the right:

Add '37.5' to each side of the equation.
-37.5 + -1.25x + 37.5 + x2 = 0 + 37.5

Reorder the terms:
-37.5 + 37.5 + -1.25x + x2 = 0 + 37.5

Combine like terms: -37.5 + 37.5 = 0.0
0.0 + -1.25x + x2 = 0 + 37.5
-1.25x + x2 = 0 + 37.5

Combine like terms: 0 + 37.5 = 37.5
-1.25x + x2 = 37.5

The x term is -1.25x.  Take half its coefficient (-0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
-1.25x + 0.390625 + x2 = 37.5 + 0.390625

Reorder the terms:
0.390625 + -1.25x + x2 = 37.5 + 0.390625

Combine like terms: 37.5 + 0.390625 = 37.890625
0.390625 + -1.25x + x2 = 37.890625

Factor a perfect square on the left side:
(x + -0.625)(x + -0.625) = 37.890625

Calculate the square root of the right side: 6.155536126

Break this problem into two subproblems by setting 
(x + -0.625) equal to 6.155536126 and -6.155536126.

Subproblem 1

x + -0.625 = 6.155536126 Simplifying x + -0.625 = 6.155536126 Reorder the terms: -0.625 + x = 6.155536126 Solving -0.625 + x = 6.155536126 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + x = 6.155536126 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + x = 6.155536126 + 0.625 x = 6.155536126 + 0.625 Combine like terms: 6.155536126 + 0.625 = 6.780536126 x = 6.780536126 Simplifying x = 6.780536126

Subproblem 2

x + -0.625 = -6.155536126 Simplifying x + -0.625 = -6.155536126 Reorder the terms: -0.625 + x = -6.155536126 Solving -0.625 + x = -6.155536126 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + x = -6.155536126 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + x = -6.155536126 + 0.625 x = -6.155536126 + 0.625 Combine like terms: -6.155536126 + 0.625 = -5.530536126 x = -5.530536126 Simplifying x = -5.530536126

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.780536126, -5.530536126}

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