q^2+2q-49=0

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Solution for q^2+2q-49=0 equation:


Simplifying
q2 + 2q + -49 = 0

Reorder the terms:
-49 + 2q + q2 = 0

Solving
-49 + 2q + q2 = 0

Solving for variable 'q'.

Begin completing the square.

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + 2q + 49 + q2 = 0 + 49

Reorder the terms:
-49 + 49 + 2q + q2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 2q + q2 = 0 + 49
2q + q2 = 0 + 49

Combine like terms: 0 + 49 = 49
2q + q2 = 49

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 = 49 + 1

Reorder the terms:
1 + 2q + q2 = 49 + 1

Combine like terms: 49 + 1 = 50
1 + 2q + q2 = 50

Factor a perfect square on the left side:
(q + 1)(q + 1) = 50

Calculate the square root of the right side: 7.071067812

Break this problem into two subproblems by setting 
(q + 1) equal to 7.071067812 and -7.071067812.

Subproblem 1

q + 1 = 7.071067812 Simplifying q + 1 = 7.071067812 Reorder the terms: 1 + q = 7.071067812 Solving 1 + q = 7.071067812 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 = 7.071067812 + -1 Combine like terms: 1 + -1 = 0 0 + q = 7.071067812 + -1 q = 7.071067812 + -1 Combine like terms: 7.071067812 + -1 = 6.071067812 q = 6.071067812 Simplifying q = 6.071067812

Subproblem 2

q + 1 = -7.071067812 Simplifying q + 1 = -7.071067812 Reorder the terms: 1 + q = -7.071067812 Solving 1 + q = -7.071067812 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 = -7.071067812 + -1 Combine like terms: 1 + -1 = 0 0 + q = -7.071067812 + -1 q = -7.071067812 + -1 Combine like terms: -7.071067812 + -1 = -8.071067812 q = -8.071067812 Simplifying q = -8.071067812

Solution

The solution to the problem is based on the solutions from the subproblems. q = {6.071067812, -8.071067812}

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