0.375-.875*X+0.5*X^2=0

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Solution for 0.375-.875*X+0.5*X^2=0 equation:


Simplifying
0.375 + -0.875X + 0.5X2 = 0

Solving
0.375 + -0.875X + 0.5X2 = 0

Solving for variable 'X'.

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

Divide each side by '0.5'.
0.75 + -1.75X + X2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -1.75X + -0.75 + X2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -1.75X + X2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -1.75X + X2 = 0 + -0.75
-1.75X + X2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-1.75X + X2 = -0.75

The X term is -1.75X.  Take half its coefficient (-0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
-1.75X + 0.765625 + X2 = -0.75 + 0.765625

Reorder the terms:
0.765625 + -1.75X + X2 = -0.75 + 0.765625

Combine like terms: -0.75 + 0.765625 = 0.015625
0.765625 + -1.75X + X2 = 0.015625

Factor a perfect square on the left side:
(X + -0.875)(X + -0.875) = 0.015625

Calculate the square root of the right side: 0.125

Break this problem into two subproblems by setting 
(X + -0.875) equal to 0.125 and -0.125.

Subproblem 1

X + -0.875 = 0.125 Simplifying X + -0.875 = 0.125 Reorder the terms: -0.875 + X = 0.125 Solving -0.875 + X = 0.125 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.875' to each side of the equation. -0.875 + 0.875 + X = 0.125 + 0.875 Combine like terms: -0.875 + 0.875 = 0.000 0.000 + X = 0.125 + 0.875 X = 0.125 + 0.875 Combine like terms: 0.125 + 0.875 = 1 X = 1 Simplifying X = 1

Subproblem 2

X + -0.875 = -0.125 Simplifying X + -0.875 = -0.125 Reorder the terms: -0.875 + X = -0.125 Solving -0.875 + X = -0.125 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.875' to each side of the equation. -0.875 + 0.875 + X = -0.125 + 0.875 Combine like terms: -0.875 + 0.875 = 0.000 0.000 + X = -0.125 + 0.875 X = -0.125 + 0.875 Combine like terms: -0.125 + 0.875 = 0.75 X = 0.75 Simplifying X = 0.75

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1, 0.75}

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