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Simplifying 9x + x2 = 12 Solving 9x + x2 = 12 Solving for variable 'x'. Reorder the terms: -12 + 9x + x2 = 12 + -12 Combine like terms: 12 + -12 = 0 -12 + 9x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '12' to each side of the equation. -12 + 9x + 12 + x2 = 0 + 12 Reorder the terms: -12 + 12 + 9x + x2 = 0 + 12 Combine like terms: -12 + 12 = 0 0 + 9x + x2 = 0 + 12 9x + x2 = 0 + 12 Combine like terms: 0 + 12 = 12 9x + x2 = 12 The x term is 9x. Take half its coefficient (4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. 9x + 20.25 + x2 = 12 + 20.25 Reorder the terms: 20.25 + 9x + x2 = 12 + 20.25 Combine like terms: 12 + 20.25 = 32.25 20.25 + 9x + x2 = 32.25 Factor a perfect square on the left side: (x + 4.5)(x + 4.5) = 32.25 Calculate the square root of the right side: 5.678908346 Break this problem into two subproblems by setting (x + 4.5) equal to 5.678908346 and -5.678908346.Subproblem 1
x + 4.5 = 5.678908346 Simplifying x + 4.5 = 5.678908346 Reorder the terms: 4.5 + x = 5.678908346 Solving 4.5 + x = 5.678908346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 5.678908346 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 5.678908346 + -4.5 x = 5.678908346 + -4.5 Combine like terms: 5.678908346 + -4.5 = 1.178908346 x = 1.178908346 Simplifying x = 1.178908346Subproblem 2
x + 4.5 = -5.678908346 Simplifying x + 4.5 = -5.678908346 Reorder the terms: 4.5 + x = -5.678908346 Solving 4.5 + x = -5.678908346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -5.678908346 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -5.678908346 + -4.5 x = -5.678908346 + -4.5 Combine like terms: -5.678908346 + -4.5 = -10.178908346 x = -10.178908346 Simplifying x = -10.178908346Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.178908346, -10.178908346}
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