.75x^2-.375x=.25

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Solution for .75x^2-.375x=.25 equation:


Simplifying
0.75x2 + -0.375x = 0.25

Reorder the terms:
-0.375x + 0.75x2 = 0.25

Solving
-0.375x + 0.75x2 = 0.25

Solving for variable 'x'.

Reorder the terms:
-0.25 + -0.375x + 0.75x2 = 0.25 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
-0.25 + -0.375x + 0.75x2 = 0.00

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

Divide each side by '0.75'.
-0.3333333333 + -0.5x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -0.5x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -0.5x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -0.5x + x2 = 0 + 0.3333333333
-0.5x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-0.5x + x2 = 0.3333333333

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 = 0.3333333333 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 0.3333333333 + 0.0625

Combine like terms: 0.3333333333 + 0.0625 = 0.3958333333
0.0625 + -0.5x + x2 = 0.3958333333

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 0.3958333333

Calculate the square root of the right side: 0.62915287

Break this problem into two subproblems by setting 
(x + -0.25) equal to 0.62915287 and -0.62915287.

Subproblem 1

x + -0.25 = 0.62915287 Simplifying x + -0.25 = 0.62915287 Reorder the terms: -0.25 + x = 0.62915287 Solving -0.25 + x = 0.62915287 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 = 0.62915287 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 0.62915287 + 0.25 x = 0.62915287 + 0.25 Combine like terms: 0.62915287 + 0.25 = 0.87915287 x = 0.87915287 Simplifying x = 0.87915287

Subproblem 2

x + -0.25 = -0.62915287 Simplifying x + -0.25 = -0.62915287 Reorder the terms: -0.25 + x = -0.62915287 Solving -0.25 + x = -0.62915287 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 = -0.62915287 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -0.62915287 + 0.25 x = -0.62915287 + 0.25 Combine like terms: -0.62915287 + 0.25 = -0.37915287 x = -0.37915287 Simplifying x = -0.37915287

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.87915287, -0.37915287}

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