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Simplifying g2 + -16g + -21 = 0 Reorder the terms: -21 + -16g + g2 = 0 Solving -21 + -16g + g2 = 0 Solving for variable 'g'. Begin completing the square. Move the constant term to the right: Add '21' to each side of the equation. -21 + -16g + 21 + g2 = 0 + 21 Reorder the terms: -21 + 21 + -16g + g2 = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -16g + g2 = 0 + 21 -16g + g2 = 0 + 21 Combine like terms: 0 + 21 = 21 -16g + g2 = 21 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 = 21 + 64 Reorder the terms: 64 + -16g + g2 = 21 + 64 Combine like terms: 21 + 64 = 85 64 + -16g + g2 = 85 Factor a perfect square on the left side: (g + -8)(g + -8) = 85 Calculate the square root of the right side: 9.219544457 Break this problem into two subproblems by setting (g + -8) equal to 9.219544457 and -9.219544457.Subproblem 1
g + -8 = 9.219544457 Simplifying g + -8 = 9.219544457 Reorder the terms: -8 + g = 9.219544457 Solving -8 + g = 9.219544457 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 = 9.219544457 + 8 Combine like terms: -8 + 8 = 0 0 + g = 9.219544457 + 8 g = 9.219544457 + 8 Combine like terms: 9.219544457 + 8 = 17.219544457 g = 17.219544457 Simplifying g = 17.219544457Subproblem 2
g + -8 = -9.219544457 Simplifying g + -8 = -9.219544457 Reorder the terms: -8 + g = -9.219544457 Solving -8 + g = -9.219544457 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 = -9.219544457 + 8 Combine like terms: -8 + 8 = 0 0 + g = -9.219544457 + 8 g = -9.219544457 + 8 Combine like terms: -9.219544457 + 8 = -1.219544457 g = -1.219544457 Simplifying g = -1.219544457Solution
The solution to the problem is based on the solutions from the subproblems. g = {17.219544457, -1.219544457}
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