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Simplifying (x + -1)(2x + 6) = 9 Reorder the terms: (-1 + x)(2x + 6) = 9 Reorder the terms: (-1 + x)(6 + 2x) = 9 Multiply (-1 + x) * (6 + 2x) (-1(6 + 2x) + x(6 + 2x)) = 9 ((6 * -1 + 2x * -1) + x(6 + 2x)) = 9 ((-6 + -2x) + x(6 + 2x)) = 9 (-6 + -2x + (6 * x + 2x * x)) = 9 (-6 + -2x + (6x + 2x2)) = 9 Combine like terms: -2x + 6x = 4x (-6 + 4x + 2x2) = 9 Solving -6 + 4x + 2x2 = 9 Solving for variable 'x'. Reorder the terms: -6 + -9 + 4x + 2x2 = 9 + -9 Combine like terms: -6 + -9 = -15 -15 + 4x + 2x2 = 9 + -9 Combine like terms: 9 + -9 = 0 -15 + 4x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -7.5 + 2x + x2 = 0 Move the constant term to the right: Add '7.5' to each side of the equation. -7.5 + 2x + 7.5 + x2 = 0 + 7.5 Reorder the terms: -7.5 + 7.5 + 2x + x2 = 0 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + 2x + x2 = 0 + 7.5 2x + x2 = 0 + 7.5 Combine like terms: 0 + 7.5 = 7.5 2x + x2 = 7.5 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 7.5 + 1 Reorder the terms: 1 + 2x + x2 = 7.5 + 1 Combine like terms: 7.5 + 1 = 8.5 1 + 2x + x2 = 8.5 Factor a perfect square on the left side: (x + 1)(x + 1) = 8.5 Calculate the square root of the right side: 2.915475947 Break this problem into two subproblems by setting (x + 1) equal to 2.915475947 and -2.915475947.Subproblem 1
x + 1 = 2.915475947 Simplifying x + 1 = 2.915475947 Reorder the terms: 1 + x = 2.915475947 Solving 1 + x = 2.915475947 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 2.915475947 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.915475947 + -1 x = 2.915475947 + -1 Combine like terms: 2.915475947 + -1 = 1.915475947 x = 1.915475947 Simplifying x = 1.915475947Subproblem 2
x + 1 = -2.915475947 Simplifying x + 1 = -2.915475947 Reorder the terms: 1 + x = -2.915475947 Solving 1 + x = -2.915475947 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -2.915475947 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.915475947 + -1 x = -2.915475947 + -1 Combine like terms: -2.915475947 + -1 = -3.915475947 x = -3.915475947 Simplifying x = -3.915475947Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.915475947, -3.915475947}
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