0.5x(2x-1)=60

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Solution for 0.5x(2x-1)=60 equation:


Simplifying
0.5x(2x + -1) = 60

Reorder the terms:
0.5x(-1 + 2x) = 60
(-1 * 0.5x + 2x * 0.5x) = 60
(-0.5x + 1x2) = 60

Solving
-0.5x + 1x2 = 60

Solving for variable 'x'.

Reorder the terms:
-60 + -0.5x + 1x2 = 60 + -60

Combine like terms: 60 + -60 = 0
-60 + -0.5x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + -0.5x + 60 + x2 = 0 + 60

Reorder the terms:
-60 + 60 + -0.5x + x2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -0.5x + x2 = 0 + 60
-0.5x + x2 = 0 + 60

Combine like terms: 0 + 60 = 60
-0.5x + x2 = 60

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 = 60 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 60 + 0.0625

Combine like terms: 60 + 0.0625 = 60.0625
0.0625 + -0.5x + x2 = 60.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 60.0625

Calculate the square root of the right side: 7.75

Break this problem into two subproblems by setting 
(x + -0.25) equal to 7.75 and -7.75.

Subproblem 1

x + -0.25 = 7.75 Simplifying x + -0.25 = 7.75 Reorder the terms: -0.25 + x = 7.75 Solving -0.25 + x = 7.75 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 = 7.75 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 7.75 + 0.25 x = 7.75 + 0.25 Combine like terms: 7.75 + 0.25 = 8 x = 8 Simplifying x = 8

Subproblem 2

x + -0.25 = -7.75 Simplifying x + -0.25 = -7.75 Reorder the terms: -0.25 + x = -7.75 Solving -0.25 + x = -7.75 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 = -7.75 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -7.75 + 0.25 x = -7.75 + 0.25 Combine like terms: -7.75 + 0.25 = -7.5 x = -7.5 Simplifying x = -7.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8, -7.5}

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