q^2-48q+420=0

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Solution for q^2-48q+420=0 equation:


Simplifying
q2 + -48q + 420 = 0

Reorder the terms:
420 + -48q + q2 = 0

Solving
420 + -48q + q2 = 0

Solving for variable 'q'.

Begin completing the square.

Move the constant term to the right:

Add '-420' to each side of the equation.
420 + -48q + -420 + q2 = 0 + -420

Reorder the terms:
420 + -420 + -48q + q2 = 0 + -420

Combine like terms: 420 + -420 = 0
0 + -48q + q2 = 0 + -420
-48q + q2 = 0 + -420

Combine like terms: 0 + -420 = -420
-48q + q2 = -420

The q term is -48q.  Take half its coefficient (-24).
Square it (576) and add it to both sides.

Add '576' to each side of the equation.
-48q + 576 + q2 = -420 + 576

Reorder the terms:
576 + -48q + q2 = -420 + 576

Combine like terms: -420 + 576 = 156
576 + -48q + q2 = 156

Factor a perfect square on the left side:
(q + -24)(q + -24) = 156

Calculate the square root of the right side: 12.489995997

Break this problem into two subproblems by setting 
(q + -24) equal to 12.489995997 and -12.489995997.

Subproblem 1

q + -24 = 12.489995997 Simplifying q + -24 = 12.489995997 Reorder the terms: -24 + q = 12.489995997 Solving -24 + q = 12.489995997 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '24' to each side of the equation. -24 + 24 + q = 12.489995997 + 24 Combine like terms: -24 + 24 = 0 0 + q = 12.489995997 + 24 q = 12.489995997 + 24 Combine like terms: 12.489995997 + 24 = 36.489995997 q = 36.489995997 Simplifying q = 36.489995997

Subproblem 2

q + -24 = -12.489995997 Simplifying q + -24 = -12.489995997 Reorder the terms: -24 + q = -12.489995997 Solving -24 + q = -12.489995997 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '24' to each side of the equation. -24 + 24 + q = -12.489995997 + 24 Combine like terms: -24 + 24 = 0 0 + q = -12.489995997 + 24 q = -12.489995997 + 24 Combine like terms: -12.489995997 + 24 = 11.510004003 q = 11.510004003 Simplifying q = 11.510004003

Solution

The solution to the problem is based on the solutions from the subproblems. q = {36.489995997, 11.510004003}

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