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Simplifying (50 + X)(10 + X) = 120 Multiply (50 + X) * (10 + X) (50(10 + X) + X(10 + X)) = 120 ((10 * 50 + X * 50) + X(10 + X)) = 120 ((500 + 50X) + X(10 + X)) = 120 (500 + 50X + (10 * X + X * X)) = 120 (500 + 50X + (10X + X2)) = 120 Combine like terms: 50X + 10X = 60X (500 + 60X + X2) = 120 Solving 500 + 60X + X2 = 120 Solving for variable 'X'. Reorder the terms: 500 + -120 + 60X + X2 = 120 + -120 Combine like terms: 500 + -120 = 380 380 + 60X + X2 = 120 + -120 Combine like terms: 120 + -120 = 0 380 + 60X + X2 = 0 Begin completing the square. Move the constant term to the right: Add '-380' to each side of the equation. 380 + 60X + -380 + X2 = 0 + -380 Reorder the terms: 380 + -380 + 60X + X2 = 0 + -380 Combine like terms: 380 + -380 = 0 0 + 60X + X2 = 0 + -380 60X + X2 = 0 + -380 Combine like terms: 0 + -380 = -380 60X + X2 = -380 The X term is 60X. Take half its coefficient (30). Square it (900) and add it to both sides. Add '900' to each side of the equation. 60X + 900 + X2 = -380 + 900 Reorder the terms: 900 + 60X + X2 = -380 + 900 Combine like terms: -380 + 900 = 520 900 + 60X + X2 = 520 Factor a perfect square on the left side: (X + 30)(X + 30) = 520 Calculate the square root of the right side: 22.803508502 Break this problem into two subproblems by setting (X + 30) equal to 22.803508502 and -22.803508502.Subproblem 1
X + 30 = 22.803508502 Simplifying X + 30 = 22.803508502 Reorder the terms: 30 + X = 22.803508502 Solving 30 + X = 22.803508502 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + X = 22.803508502 + -30 Combine like terms: 30 + -30 = 0 0 + X = 22.803508502 + -30 X = 22.803508502 + -30 Combine like terms: 22.803508502 + -30 = -7.196491498 X = -7.196491498 Simplifying X = -7.196491498Subproblem 2
X + 30 = -22.803508502 Simplifying X + 30 = -22.803508502 Reorder the terms: 30 + X = -22.803508502 Solving 30 + X = -22.803508502 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + X = -22.803508502 + -30 Combine like terms: 30 + -30 = 0 0 + X = -22.803508502 + -30 X = -22.803508502 + -30 Combine like terms: -22.803508502 + -30 = -52.803508502 X = -52.803508502 Simplifying X = -52.803508502Solution
The solution to the problem is based on the solutions from the subproblems. X = {-7.196491498, -52.803508502}
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