q^2+2q-100=0

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Solution for q^2+2q-100=0 equation:


Simplifying
q2 + 2q + -100 = 0

Reorder the terms:
-100 + 2q + q2 = 0

Solving
-100 + 2q + q2 = 0

Solving for variable 'q'.

Begin completing the square.

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + 2q + 100 + q2 = 0 + 100

Reorder the terms:
-100 + 100 + 2q + q2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + 2q + q2 = 0 + 100
2q + q2 = 0 + 100

Combine like terms: 0 + 100 = 100
2q + q2 = 100

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 = 100 + 1

Reorder the terms:
1 + 2q + q2 = 100 + 1

Combine like terms: 100 + 1 = 101
1 + 2q + q2 = 101

Factor a perfect square on the left side:
(q + 1)(q + 1) = 101

Calculate the square root of the right side: 10.049875621

Break this problem into two subproblems by setting 
(q + 1) equal to 10.049875621 and -10.049875621.

Subproblem 1

q + 1 = 10.049875621 Simplifying q + 1 = 10.049875621 Reorder the terms: 1 + q = 10.049875621 Solving 1 + q = 10.049875621 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 = 10.049875621 + -1 Combine like terms: 1 + -1 = 0 0 + q = 10.049875621 + -1 q = 10.049875621 + -1 Combine like terms: 10.049875621 + -1 = 9.049875621 q = 9.049875621 Simplifying q = 9.049875621

Subproblem 2

q + 1 = -10.049875621 Simplifying q + 1 = -10.049875621 Reorder the terms: 1 + q = -10.049875621 Solving 1 + q = -10.049875621 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 = -10.049875621 + -1 Combine like terms: 1 + -1 = 0 0 + q = -10.049875621 + -1 q = -10.049875621 + -1 Combine like terms: -10.049875621 + -1 = -11.049875621 q = -11.049875621 Simplifying q = -11.049875621

Solution

The solution to the problem is based on the solutions from the subproblems. q = {9.049875621, -11.049875621}

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