.5g^2+8g=-7

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Solution for .5g^2+8g=-7 equation:


Simplifying
0.5g2 + 8g = -7

Reorder the terms:
8g + 0.5g2 = -7

Solving
8g + 0.5g2 = -7

Solving for variable 'g'.

Reorder the terms:
7 + 8g + 0.5g2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + 8g + 0.5g2 = 0

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

Divide each side by '0.5'.
14 + 16g + g2 = 0

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + 16g + -14 + g2 = 0 + -14

Reorder the terms:
14 + -14 + 16g + g2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + 16g + g2 = 0 + -14
16g + g2 = 0 + -14

Combine like terms: 0 + -14 = -14
16g + g2 = -14

The g term is 16g.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16g + 64 + g2 = -14 + 64

Reorder the terms:
64 + 16g + g2 = -14 + 64

Combine like terms: -14 + 64 = 50
64 + 16g + g2 = 50

Factor a perfect square on the left side:
(g + 8)(g + 8) = 50

Calculate the square root of the right side: 7.071067812

Break this problem into two subproblems by setting 
(g + 8) equal to 7.071067812 and -7.071067812.

Subproblem 1

g + 8 = 7.071067812 Simplifying g + 8 = 7.071067812 Reorder the terms: 8 + g = 7.071067812 Solving 8 + g = 7.071067812 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + g = 7.071067812 + -8 Combine like terms: 8 + -8 = 0 0 + g = 7.071067812 + -8 g = 7.071067812 + -8 Combine like terms: 7.071067812 + -8 = -0.928932188 g = -0.928932188 Simplifying g = -0.928932188

Subproblem 2

g + 8 = -7.071067812 Simplifying g + 8 = -7.071067812 Reorder the terms: 8 + g = -7.071067812 Solving 8 + g = -7.071067812 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + g = -7.071067812 + -8 Combine like terms: 8 + -8 = 0 0 + g = -7.071067812 + -8 g = -7.071067812 + -8 Combine like terms: -7.071067812 + -8 = -15.071067812 g = -15.071067812 Simplifying g = -15.071067812

Solution

The solution to the problem is based on the solutions from the subproblems. g = {-0.928932188, -15.071067812}

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