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Simplifying 2250 = -0.1x2 + 30x Reorder the terms: 2250 = 30x + -0.1x2 Solving 2250 = 30x + -0.1x2 Solving for variable 'x'. Reorder the terms: 2250 + -30x + 0.1x2 = 30x + -30x + -0.1x2 + 0.1x2 Combine like terms: 30x + -30x = 0 2250 + -30x + 0.1x2 = 0 + -0.1x2 + 0.1x2 2250 + -30x + 0.1x2 = -0.1x2 + 0.1x2 Combine like terms: -0.1x2 + 0.1x2 = 0.0 2250 + -30x + 0.1x2 = 0.0 Begin completing the square. Divide all terms by 0.1 the coefficient of the squared term: Divide each side by '0.1'. 22500 + -300x + x2 = 0 Move the constant term to the right: Add '-22500' to each side of the equation. 22500 + -300x + -22500 + x2 = 0 + -22500 Reorder the terms: 22500 + -22500 + -300x + x2 = 0 + -22500 Combine like terms: 22500 + -22500 = 0 0 + -300x + x2 = 0 + -22500 -300x + x2 = 0 + -22500 Combine like terms: 0 + -22500 = -22500 -300x + x2 = -22500 The x term is -300x. Take half its coefficient (-150). Square it (22500) and add it to both sides. Add '22500' to each side of the equation. -300x + 22500 + x2 = -22500 + 22500 Reorder the terms: 22500 + -300x + x2 = -22500 + 22500 Combine like terms: -22500 + 22500 = 0 22500 + -300x + x2 = 0 Factor a perfect square on the left side: (x + -150)(x + -150) = 0 Calculate the square root of the right side: 0 Break this problem into two subproblems by setting (x + -150) equal to 0 and 0.Subproblem 1
x + -150 = 0 Simplifying x + -150 = 0 Reorder the terms: -150 + x = 0 Solving -150 + x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '150' to each side of the equation. -150 + 150 + x = 0 + 150 Combine like terms: -150 + 150 = 0 0 + x = 0 + 150 x = 0 + 150 Combine like terms: 0 + 150 = 150 x = 150 Simplifying x = 150Subproblem 2
x + -150 = 0 Simplifying x + -150 = 0 Reorder the terms: -150 + x = 0 Solving -150 + x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '150' to each side of the equation. -150 + 150 + x = 0 + 150 Combine like terms: -150 + 150 = 0 0 + x = 0 + 150 x = 0 + 150 Combine like terms: 0 + 150 = 150 x = 150 Simplifying x = 150Solution
The solution to the problem is based on the solutions from the subproblems. x = {150, 150}
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