=-q^2+8q+41

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Solution for =-q^2+8q+41 equation:


Simplifying
0 = -1q2 + 8q + 41

Reorder the terms:
0 = 41 + 8q + -1q2

Solving
0 = 41 + 8q + -1q2

Solving for variable 'q'.

Combine like terms: 0 + -41 = -41
-41 + -8q + q2 = 41 + 8q + -1q2 + -41 + -8q + q2

Reorder the terms:
-41 + -8q + q2 = 41 + -41 + 8q + -8q + -1q2 + q2

Combine like terms: 41 + -41 = 0
-41 + -8q + q2 = 0 + 8q + -8q + -1q2 + q2
-41 + -8q + q2 = 8q + -8q + -1q2 + q2

Combine like terms: 8q + -8q = 0
-41 + -8q + q2 = 0 + -1q2 + q2
-41 + -8q + q2 = -1q2 + q2

Combine like terms: -1q2 + q2 = 0
-41 + -8q + q2 = 0

Begin completing the square.

Move the constant term to the right:

Add '41' to each side of the equation.
-41 + -8q + 41 + q2 = 0 + 41

Reorder the terms:
-41 + 41 + -8q + q2 = 0 + 41

Combine like terms: -41 + 41 = 0
0 + -8q + q2 = 0 + 41
-8q + q2 = 0 + 41

Combine like terms: 0 + 41 = 41
-8q + q2 = 41

The q term is -8q.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8q + 16 + q2 = 41 + 16

Reorder the terms:
16 + -8q + q2 = 41 + 16

Combine like terms: 41 + 16 = 57
16 + -8q + q2 = 57

Factor a perfect square on the left side:
(q + -4)(q + -4) = 57

Calculate the square root of the right side: 7.549834435

Break this problem into two subproblems by setting 
(q + -4) equal to 7.549834435 and -7.549834435.

Subproblem 1

q + -4 = 7.549834435 Simplifying q + -4 = 7.549834435 Reorder the terms: -4 + q = 7.549834435 Solving -4 + q = 7.549834435 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + q = 7.549834435 + 4 Combine like terms: -4 + 4 = 0 0 + q = 7.549834435 + 4 q = 7.549834435 + 4 Combine like terms: 7.549834435 + 4 = 11.549834435 q = 11.549834435 Simplifying q = 11.549834435

Subproblem 2

q + -4 = -7.549834435 Simplifying q + -4 = -7.549834435 Reorder the terms: -4 + q = -7.549834435 Solving -4 + q = -7.549834435 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + q = -7.549834435 + 4 Combine like terms: -4 + 4 = 0 0 + q = -7.549834435 + 4 q = -7.549834435 + 4 Combine like terms: -7.549834435 + 4 = -3.549834435 q = -3.549834435 Simplifying q = -3.549834435

Solution

The solution to the problem is based on the solutions from the subproblems. q = {11.549834435, -3.549834435}

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