g^2-105=-4g^2+20g

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Solution for g^2-105=-4g^2+20g equation:


Simplifying
g2 + -105 = -4g2 + 20g

Reorder the terms:
-105 + g2 = -4g2 + 20g

Reorder the terms:
-105 + g2 = 20g + -4g2

Solving
-105 + g2 = 20g + -4g2

Solving for variable 'g'.

Reorder the terms:
-105 + -20g + g2 + 4g2 = 20g + -4g2 + -20g + 4g2

Combine like terms: g2 + 4g2 = 5g2
-105 + -20g + 5g2 = 20g + -4g2 + -20g + 4g2

Reorder the terms:
-105 + -20g + 5g2 = 20g + -20g + -4g2 + 4g2

Combine like terms: 20g + -20g = 0
-105 + -20g + 5g2 = 0 + -4g2 + 4g2
-105 + -20g + 5g2 = -4g2 + 4g2

Combine like terms: -4g2 + 4g2 = 0
-105 + -20g + 5g2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-21 + -4g + g2) = 0

Factor a trinomial.
5((-3 + -1g)(7 + -1g)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-3 + -1g)' equal to zero and attempt to solve: Simplifying -3 + -1g = 0 Solving -3 + -1g = 0 Move all terms containing g to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1g = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1g = 0 + 3 -1g = 0 + 3 Combine like terms: 0 + 3 = 3 -1g = 3 Divide each side by '-1'. g = -3 Simplifying g = -3

Subproblem 2

Set the factor '(7 + -1g)' equal to zero and attempt to solve: Simplifying 7 + -1g = 0 Solving 7 + -1g = 0 Move all terms containing g to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1g = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1g = 0 + -7 -1g = 0 + -7 Combine like terms: 0 + -7 = -7 -1g = -7 Divide each side by '-1'. g = 7 Simplifying g = 7

Solution

g = {-3, 7}

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