10-2q-(q*q)=0

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Solution for 10-2q-(q*q)=0 equation:


Simplifying
10 + -2q + -1(q * q) = 0

Multiply q * q
10 + -2q + -1(q2) = 0

Solving
10 + -2q + -1q2 = 0

Solving for variable 'q'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-10 + 2q + q2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + 2q + 10 + q2 = 0 + 10

Reorder the terms:
-10 + 10 + 2q + q2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 2q + q2 = 0 + 10
2q + q2 = 0 + 10

Combine like terms: 0 + 10 = 10
2q + q2 = 10

The q term is 2q.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2q + 1 + q2 = 10 + 1

Reorder the terms:
1 + 2q + q2 = 10 + 1

Combine like terms: 10 + 1 = 11
1 + 2q + q2 = 11

Factor a perfect square on the left side:
(q + 1)(q + 1) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(q + 1) equal to 3.31662479 and -3.31662479.

Subproblem 1

q + 1 = 3.31662479 Simplifying q + 1 = 3.31662479 Reorder the terms: 1 + q = 3.31662479 Solving 1 + q = 3.31662479 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + q = 3.31662479 + -1 Combine like terms: 1 + -1 = 0 0 + q = 3.31662479 + -1 q = 3.31662479 + -1 Combine like terms: 3.31662479 + -1 = 2.31662479 q = 2.31662479 Simplifying q = 2.31662479

Subproblem 2

q + 1 = -3.31662479 Simplifying q + 1 = -3.31662479 Reorder the terms: 1 + q = -3.31662479 Solving 1 + q = -3.31662479 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + q = -3.31662479 + -1 Combine like terms: 1 + -1 = 0 0 + q = -3.31662479 + -1 q = -3.31662479 + -1 Combine like terms: -3.31662479 + -1 = -4.31662479 q = -4.31662479 Simplifying q = -4.31662479

Solution

The solution to the problem is based on the solutions from the subproblems. q = {2.31662479, -4.31662479}

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