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Simplifying (x + -1)(x + -9) = 8 Reorder the terms: (-1 + x)(x + -9) = 8 Reorder the terms: (-1 + x)(-9 + x) = 8 Multiply (-1 + x) * (-9 + x) (-1(-9 + x) + x(-9 + x)) = 8 ((-9 * -1 + x * -1) + x(-9 + x)) = 8 ((9 + -1x) + x(-9 + x)) = 8 (9 + -1x + (-9 * x + x * x)) = 8 (9 + -1x + (-9x + x2)) = 8 Combine like terms: -1x + -9x = -10x (9 + -10x + x2) = 8 Solving 9 + -10x + x2 = 8 Solving for variable 'x'. Reorder the terms: 9 + -8 + -10x + x2 = 8 + -8 Combine like terms: 9 + -8 = 1 1 + -10x + x2 = 8 + -8 Combine like terms: 8 + -8 = 0 1 + -10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + -10x + -1 + x2 = 0 + -1 Reorder the terms: 1 + -1 + -10x + x2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -10x + x2 = 0 + -1 -10x + x2 = 0 + -1 Combine like terms: 0 + -1 = -1 -10x + x2 = -1 The x term is -10x. Take half its coefficient (-5). Square it (25) and add it to both sides. Add '25' to each side of the equation. -10x + 25 + x2 = -1 + 25 Reorder the terms: 25 + -10x + x2 = -1 + 25 Combine like terms: -1 + 25 = 24 25 + -10x + x2 = 24 Factor a perfect square on the left side: (x + -5)(x + -5) = 24 Calculate the square root of the right side: 4.898979486 Break this problem into two subproblems by setting (x + -5) equal to 4.898979486 and -4.898979486.Subproblem 1
x + -5 = 4.898979486 Simplifying x + -5 = 4.898979486 Reorder the terms: -5 + x = 4.898979486 Solving -5 + x = 4.898979486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 4.898979486 + 5 Combine like terms: -5 + 5 = 0 0 + x = 4.898979486 + 5 x = 4.898979486 + 5 Combine like terms: 4.898979486 + 5 = 9.898979486 x = 9.898979486 Simplifying x = 9.898979486Subproblem 2
x + -5 = -4.898979486 Simplifying x + -5 = -4.898979486 Reorder the terms: -5 + x = -4.898979486 Solving -5 + x = -4.898979486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -4.898979486 + 5 Combine like terms: -5 + 5 = 0 0 + x = -4.898979486 + 5 x = -4.898979486 + 5 Combine like terms: -4.898979486 + 5 = 0.101020514 x = 0.101020514 Simplifying x = 0.101020514Solution
The solution to the problem is based on the solutions from the subproblems. x = {9.898979486, 0.101020514}
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