5g(3g+5)+3(g-7)=

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Solution for 5g(3g+5)+3(g-7)= equation:


Simplifying
5g(3g + 5) + 3(g + -7) = 0

Reorder the terms:
5g(5 + 3g) + 3(g + -7) = 0
(5 * 5g + 3g * 5g) + 3(g + -7) = 0
(25g + 15g2) + 3(g + -7) = 0

Reorder the terms:
25g + 15g2 + 3(-7 + g) = 0
25g + 15g2 + (-7 * 3 + g * 3) = 0
25g + 15g2 + (-21 + 3g) = 0

Reorder the terms:
-21 + 25g + 3g + 15g2 = 0

Combine like terms: 25g + 3g = 28g
-21 + 28g + 15g2 = 0

Solving
-21 + 28g + 15g2 = 0

Solving for variable 'g'.

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

Divide each side by '15'.
-1.4 + 1.866666667g + g2 = 0

Move the constant term to the right:

Add '1.4' to each side of the equation.
-1.4 + 1.866666667g + 1.4 + g2 = 0 + 1.4

Reorder the terms:
-1.4 + 1.4 + 1.866666667g + g2 = 0 + 1.4

Combine like terms: -1.4 + 1.4 = 0.0
0.0 + 1.866666667g + g2 = 0 + 1.4
1.866666667g + g2 = 0 + 1.4

Combine like terms: 0 + 1.4 = 1.4
1.866666667g + g2 = 1.4

The g term is 1.866666667g.  Take half its coefficient (0.9333333335).
Square it (0.8711111114) and add it to both sides.

Add '0.8711111114' to each side of the equation.
1.866666667g + 0.8711111114 + g2 = 1.4 + 0.8711111114

Reorder the terms:
0.8711111114 + 1.866666667g + g2 = 1.4 + 0.8711111114

Combine like terms: 1.4 + 0.8711111114 = 2.2711111114
0.8711111114 + 1.866666667g + g2 = 2.2711111114

Factor a perfect square on the left side:
(g + 0.9333333335)(g + 0.9333333335) = 2.2711111114

Calculate the square root of the right side: 1.507020607

Break this problem into two subproblems by setting 
(g + 0.9333333335) equal to 1.507020607 and -1.507020607.

Subproblem 1

g + 0.9333333335 = 1.507020607 Simplifying g + 0.9333333335 = 1.507020607 Reorder the terms: 0.9333333335 + g = 1.507020607 Solving 0.9333333335 + g = 1.507020607 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-0.9333333335' to each side of the equation. 0.9333333335 + -0.9333333335 + g = 1.507020607 + -0.9333333335 Combine like terms: 0.9333333335 + -0.9333333335 = 0.0000000000 0.0000000000 + g = 1.507020607 + -0.9333333335 g = 1.507020607 + -0.9333333335 Combine like terms: 1.507020607 + -0.9333333335 = 0.5736872735 g = 0.5736872735 Simplifying g = 0.5736872735

Subproblem 2

g + 0.9333333335 = -1.507020607 Simplifying g + 0.9333333335 = -1.507020607 Reorder the terms: 0.9333333335 + g = -1.507020607 Solving 0.9333333335 + g = -1.507020607 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-0.9333333335' to each side of the equation. 0.9333333335 + -0.9333333335 + g = -1.507020607 + -0.9333333335 Combine like terms: 0.9333333335 + -0.9333333335 = 0.0000000000 0.0000000000 + g = -1.507020607 + -0.9333333335 g = -1.507020607 + -0.9333333335 Combine like terms: -1.507020607 + -0.9333333335 = -2.4403539405 g = -2.4403539405 Simplifying g = -2.4403539405

Solution

The solution to the problem is based on the solutions from the subproblems. g = {0.5736872735, -2.4403539405}

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