35=10+2Q+0.5Q^2

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Solution for 35=10+2Q+0.5Q^2 equation:


Simplifying
35 = 10 + 2Q + 0.5Q2

Solving
35 = 10 + 2Q + 0.5Q2

Solving for variable 'Q'.

Combine like terms: 35 + -10 = 25
25 + -2Q + -0.5Q2 = 10 + 2Q + 0.5Q2 + -10 + -2Q + -0.5Q2

Reorder the terms:
25 + -2Q + -0.5Q2 = 10 + -10 + 2Q + -2Q + 0.5Q2 + -0.5Q2

Combine like terms: 10 + -10 = 0
25 + -2Q + -0.5Q2 = 0 + 2Q + -2Q + 0.5Q2 + -0.5Q2
25 + -2Q + -0.5Q2 = 2Q + -2Q + 0.5Q2 + -0.5Q2

Combine like terms: 2Q + -2Q = 0
25 + -2Q + -0.5Q2 = 0 + 0.5Q2 + -0.5Q2
25 + -2Q + -0.5Q2 = 0.5Q2 + -0.5Q2

Combine like terms: 0.5Q2 + -0.5Q2 = 0.0
25 + -2Q + -0.5Q2 = 0.0

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

Divide each side by '-0.5'.
-50 + 4Q + Q2 = 0

Move the constant term to the right:

Add '50' to each side of the equation.
-50 + 4Q + 50 + Q2 = 0 + 50

Reorder the terms:
-50 + 50 + 4Q + Q2 = 0 + 50

Combine like terms: -50 + 50 = 0
0 + 4Q + Q2 = 0 + 50
4Q + Q2 = 0 + 50

Combine like terms: 0 + 50 = 50
4Q + Q2 = 50

The Q term is 4Q.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4Q + 4 + Q2 = 50 + 4

Reorder the terms:
4 + 4Q + Q2 = 50 + 4

Combine like terms: 50 + 4 = 54
4 + 4Q + Q2 = 54

Factor a perfect square on the left side:
(Q + 2)(Q + 2) = 54

Calculate the square root of the right side: 7.348469228

Break this problem into two subproblems by setting 
(Q + 2) equal to 7.348469228 and -7.348469228.

Subproblem 1

Q + 2 = 7.348469228 Simplifying Q + 2 = 7.348469228 Reorder the terms: 2 + Q = 7.348469228 Solving 2 + Q = 7.348469228 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + Q = 7.348469228 + -2 Combine like terms: 2 + -2 = 0 0 + Q = 7.348469228 + -2 Q = 7.348469228 + -2 Combine like terms: 7.348469228 + -2 = 5.348469228 Q = 5.348469228 Simplifying Q = 5.348469228

Subproblem 2

Q + 2 = -7.348469228 Simplifying Q + 2 = -7.348469228 Reorder the terms: 2 + Q = -7.348469228 Solving 2 + Q = -7.348469228 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + Q = -7.348469228 + -2 Combine like terms: 2 + -2 = 0 0 + Q = -7.348469228 + -2 Q = -7.348469228 + -2 Combine like terms: -7.348469228 + -2 = -9.348469228 Q = -9.348469228 Simplifying Q = -9.348469228

Solution

The solution to the problem is based on the solutions from the subproblems. Q = {5.348469228, -9.348469228}

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