.5Q^2-12Q+8=0

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Solution for .5Q^2-12Q+8=0 equation:


Simplifying
0.5Q2 + -12Q + 8 = 0

Reorder the terms:
8 + -12Q + 0.5Q2 = 0

Solving
8 + -12Q + 0.5Q2 = 0

Solving for variable 'Q'.

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

Divide each side by '0.5'.
16 + -24Q + Q2 = 0

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + -24Q + -16 + Q2 = 0 + -16

Reorder the terms:
16 + -16 + -24Q + Q2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -24Q + Q2 = 0 + -16
-24Q + Q2 = 0 + -16

Combine like terms: 0 + -16 = -16
-24Q + Q2 = -16

The Q term is -24Q.  Take half its coefficient (-12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
-24Q + 144 + Q2 = -16 + 144

Reorder the terms:
144 + -24Q + Q2 = -16 + 144

Combine like terms: -16 + 144 = 128
144 + -24Q + Q2 = 128

Factor a perfect square on the left side:
(Q + -12)(Q + -12) = 128

Calculate the square root of the right side: 11.313708499

Break this problem into two subproblems by setting 
(Q + -12) equal to 11.313708499 and -11.313708499.

Subproblem 1

Q + -12 = 11.313708499 Simplifying Q + -12 = 11.313708499 Reorder the terms: -12 + Q = 11.313708499 Solving -12 + Q = 11.313708499 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + Q = 11.313708499 + 12 Combine like terms: -12 + 12 = 0 0 + Q = 11.313708499 + 12 Q = 11.313708499 + 12 Combine like terms: 11.313708499 + 12 = 23.313708499 Q = 23.313708499 Simplifying Q = 23.313708499

Subproblem 2

Q + -12 = -11.313708499 Simplifying Q + -12 = -11.313708499 Reorder the terms: -12 + Q = -11.313708499 Solving -12 + Q = -11.313708499 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + Q = -11.313708499 + 12 Combine like terms: -12 + 12 = 0 0 + Q = -11.313708499 + 12 Q = -11.313708499 + 12 Combine like terms: -11.313708499 + 12 = 0.686291501 Q = 0.686291501 Simplifying Q = 0.686291501

Solution

The solution to the problem is based on the solutions from the subproblems. Q = {23.313708499, 0.686291501}

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