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Simplifying 0 = (1.2 + -1x)(1.5 + -1x) Multiply (1.2 + -1x) * (1.5 + -1x) 0 = (1.2(1.5 + -1x) + -1x * (1.5 + -1x)) 0 = ((1.5 * 1.2 + -1x * 1.2) + -1x * (1.5 + -1x)) 0 = ((1.8 + -1.2x) + -1x * (1.5 + -1x)) 0 = (1.8 + -1.2x + (1.5 * -1x + -1x * -1x)) 0 = (1.8 + -1.2x + (-1.5x + 1x2)) Combine like terms: -1.2x + -1.5x = -2.7x 0 = (1.8 + -2.7x + 1x2) Solving 0 = 1.8 + -2.7x + 1x2 Solving for variable 'x'. Combine like terms: 0 + -1.8 = -1.8 -1.8 + 2.7x + -1x2 = 1.8 + -2.7x + 1x2 + -1.8 + 2.7x + -1x2 Reorder the terms: -1.8 + 2.7x + -1x2 = 1.8 + -1.8 + -2.7x + 2.7x + 1x2 + -1x2 Combine like terms: 1.8 + -1.8 = 0.0 -1.8 + 2.7x + -1x2 = 0.0 + -2.7x + 2.7x + 1x2 + -1x2 -1.8 + 2.7x + -1x2 = -2.7x + 2.7x + 1x2 + -1x2 Combine like terms: -2.7x + 2.7x = 0.0 -1.8 + 2.7x + -1x2 = 0.0 + 1x2 + -1x2 -1.8 + 2.7x + -1x2 = 1x2 + -1x2 Combine like terms: 1x2 + -1x2 = 0 -1.8 + 2.7x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 1.8 + -2.7x + x2 = 0 Move the constant term to the right: Add '-1.8' to each side of the equation. 1.8 + -2.7x + -1.8 + x2 = 0 + -1.8 Reorder the terms: 1.8 + -1.8 + -2.7x + x2 = 0 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + -2.7x + x2 = 0 + -1.8 -2.7x + x2 = 0 + -1.8 Combine like terms: 0 + -1.8 = -1.8 -2.7x + x2 = -1.8 The x term is -2.7x. Take half its coefficient (-1.35). Square it (1.8225) and add it to both sides. Add '1.8225' to each side of the equation. -2.7x + 1.8225 + x2 = -1.8 + 1.8225 Reorder the terms: 1.8225 + -2.7x + x2 = -1.8 + 1.8225 Combine like terms: -1.8 + 1.8225 = 0.0225 1.8225 + -2.7x + x2 = 0.0225 Factor a perfect square on the left side: (x + -1.35)(x + -1.35) = 0.0225 Calculate the square root of the right side: 0.15 Break this problem into two subproblems by setting (x + -1.35) equal to 0.15 and -0.15.Subproblem 1
x + -1.35 = 0.15 Simplifying x + -1.35 = 0.15 Reorder the terms: -1.35 + x = 0.15 Solving -1.35 + x = 0.15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.35' to each side of the equation. -1.35 + 1.35 + x = 0.15 + 1.35 Combine like terms: -1.35 + 1.35 = 0.00 0.00 + x = 0.15 + 1.35 x = 0.15 + 1.35 Combine like terms: 0.15 + 1.35 = 1.5 x = 1.5 Simplifying x = 1.5Subproblem 2
x + -1.35 = -0.15 Simplifying x + -1.35 = -0.15 Reorder the terms: -1.35 + x = -0.15 Solving -1.35 + x = -0.15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.35' to each side of the equation. -1.35 + 1.35 + x = -0.15 + 1.35 Combine like terms: -1.35 + 1.35 = 0.00 0.00 + x = -0.15 + 1.35 x = -0.15 + 1.35 Combine like terms: -0.15 + 1.35 = 1.2 x = 1.2 Simplifying x = 1.2Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.5, 1.2}
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