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Simplifying (9 + -1x)(9 + -1x) = 17 Multiply (9 + -1x) * (9 + -1x) (9(9 + -1x) + -1x * (9 + -1x)) = 17 ((9 * 9 + -1x * 9) + -1x * (9 + -1x)) = 17 ((81 + -9x) + -1x * (9 + -1x)) = 17 (81 + -9x + (9 * -1x + -1x * -1x)) = 17 (81 + -9x + (-9x + 1x2)) = 17 Combine like terms: -9x + -9x = -18x (81 + -18x + 1x2) = 17 Solving 81 + -18x + 1x2 = 17 Solving for variable 'x'. Reorder the terms: 81 + -17 + -18x + 1x2 = 17 + -17 Combine like terms: 81 + -17 = 64 64 + -18x + 1x2 = 17 + -17 Combine like terms: 17 + -17 = 0 64 + -18x + 1x2 = 0 Begin completing the square. Move the constant term to the right: Add '-64' to each side of the equation. 64 + -18x + -64 + x2 = 0 + -64 Reorder the terms: 64 + -64 + -18x + x2 = 0 + -64 Combine like terms: 64 + -64 = 0 0 + -18x + x2 = 0 + -64 -18x + x2 = 0 + -64 Combine like terms: 0 + -64 = -64 -18x + x2 = -64 The x term is -18x. Take half its coefficient (-9). Square it (81) and add it to both sides. Add '81' to each side of the equation. -18x + 81 + x2 = -64 + 81 Reorder the terms: 81 + -18x + x2 = -64 + 81 Combine like terms: -64 + 81 = 17 81 + -18x + x2 = 17 Factor a perfect square on the left side: (x + -9)(x + -9) = 17 Calculate the square root of the right side: 4.123105626 Break this problem into two subproblems by setting (x + -9) equal to 4.123105626 and -4.123105626.Subproblem 1
x + -9 = 4.123105626 Simplifying x + -9 = 4.123105626 Reorder the terms: -9 + x = 4.123105626 Solving -9 + x = 4.123105626 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = 4.123105626 + 9 Combine like terms: -9 + 9 = 0 0 + x = 4.123105626 + 9 x = 4.123105626 + 9 Combine like terms: 4.123105626 + 9 = 13.123105626 x = 13.123105626 Simplifying x = 13.123105626Subproblem 2
x + -9 = -4.123105626 Simplifying x + -9 = -4.123105626 Reorder the terms: -9 + x = -4.123105626 Solving -9 + x = -4.123105626 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = -4.123105626 + 9 Combine like terms: -9 + 9 = 0 0 + x = -4.123105626 + 9 x = -4.123105626 + 9 Combine like terms: -4.123105626 + 9 = 4.876894374 x = 4.876894374 Simplifying x = 4.876894374Solution
The solution to the problem is based on the solutions from the subproblems. x = {13.123105626, 4.876894374}
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