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Simplifying 600 = 3(x + -6)(2.5x + -6) Reorder the terms: 600 = 3(-6 + x)(2.5x + -6) Reorder the terms: 600 = 3(-6 + x)(-6 + 2.5x) Multiply (-6 + x) * (-6 + 2.5x) 600 = 3(-6(-6 + 2.5x) + x(-6 + 2.5x)) 600 = 3((-6 * -6 + 2.5x * -6) + x(-6 + 2.5x)) 600 = 3((36 + -15x) + x(-6 + 2.5x)) 600 = 3(36 + -15x + (-6 * x + 2.5x * x)) 600 = 3(36 + -15x + (-6x + 2.5x2)) Combine like terms: -15x + -6x = -21x 600 = 3(36 + -21x + 2.5x2) 600 = (36 * 3 + -21x * 3 + 2.5x2 * 3) 600 = (108 + -63x + 7.5x2) Solving 600 = 108 + -63x + 7.5x2 Solving for variable 'x'. Combine like terms: 600 + -108 = 492 492 + 63x + -7.5x2 = 108 + -63x + 7.5x2 + -108 + 63x + -7.5x2 Reorder the terms: 492 + 63x + -7.5x2 = 108 + -108 + -63x + 63x + 7.5x2 + -7.5x2 Combine like terms: 108 + -108 = 0 492 + 63x + -7.5x2 = 0 + -63x + 63x + 7.5x2 + -7.5x2 492 + 63x + -7.5x2 = -63x + 63x + 7.5x2 + -7.5x2 Combine like terms: -63x + 63x = 0 492 + 63x + -7.5x2 = 0 + 7.5x2 + -7.5x2 492 + 63x + -7.5x2 = 7.5x2 + -7.5x2 Combine like terms: 7.5x2 + -7.5x2 = 0.0 492 + 63x + -7.5x2 = 0.0 Begin completing the square. Divide all terms by -7.5 the coefficient of the squared term: Divide each side by '-7.5'. -65.6 + -8.4x + x2 = 0 Move the constant term to the right: Add '65.6' to each side of the equation. -65.6 + -8.4x + 65.6 + x2 = 0 + 65.6 Reorder the terms: -65.6 + 65.6 + -8.4x + x2 = 0 + 65.6 Combine like terms: -65.6 + 65.6 = 0.0 0.0 + -8.4x + x2 = 0 + 65.6 -8.4x + x2 = 0 + 65.6 Combine like terms: 0 + 65.6 = 65.6 -8.4x + x2 = 65.6 The x term is -8.4x. Take half its coefficient (-4.2). Square it (17.64) and add it to both sides. Add '17.64' to each side of the equation. -8.4x + 17.64 + x2 = 65.6 + 17.64 Reorder the terms: 17.64 + -8.4x + x2 = 65.6 + 17.64 Combine like terms: 65.6 + 17.64 = 83.24 17.64 + -8.4x + x2 = 83.24 Factor a perfect square on the left side: (x + -4.2)(x + -4.2) = 83.24 Calculate the square root of the right side: 9.123595782 Break this problem into two subproblems by setting (x + -4.2) equal to 9.123595782 and -9.123595782.Subproblem 1
x + -4.2 = 9.123595782 Simplifying x + -4.2 = 9.123595782 Reorder the terms: -4.2 + x = 9.123595782 Solving -4.2 + x = 9.123595782 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.2' to each side of the equation. -4.2 + 4.2 + x = 9.123595782 + 4.2 Combine like terms: -4.2 + 4.2 = 0.0 0.0 + x = 9.123595782 + 4.2 x = 9.123595782 + 4.2 Combine like terms: 9.123595782 + 4.2 = 13.323595782 x = 13.323595782 Simplifying x = 13.323595782Subproblem 2
x + -4.2 = -9.123595782 Simplifying x + -4.2 = -9.123595782 Reorder the terms: -4.2 + x = -9.123595782 Solving -4.2 + x = -9.123595782 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.2' to each side of the equation. -4.2 + 4.2 + x = -9.123595782 + 4.2 Combine like terms: -4.2 + 4.2 = 0.0 0.0 + x = -9.123595782 + 4.2 x = -9.123595782 + 4.2 Combine like terms: -9.123595782 + 4.2 = -4.923595782 x = -4.923595782 Simplifying x = -4.923595782Solution
The solution to the problem is based on the solutions from the subproblems. x = {13.323595782, -4.923595782}
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