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Simplifying 0.1x2 + -1.6x + 1.5 = 0 Reorder the terms: 1.5 + -1.6x + 0.1x2 = 0 Solving 1.5 + -1.6x + 0.1x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 0.1 the coefficient of the squared term: Divide each side by '0.1'. 15 + -16x + x2 = 0 Move the constant term to the right: Add '-15' to each side of the equation. 15 + -16x + -15 + x2 = 0 + -15 Reorder the terms: 15 + -15 + -16x + x2 = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -16x + x2 = 0 + -15 -16x + x2 = 0 + -15 Combine like terms: 0 + -15 = -15 -16x + x2 = -15 The x term is -16x. Take half its coefficient (-8). Square it (64) and add it to both sides. Add '64' to each side of the equation. -16x + 64 + x2 = -15 + 64 Reorder the terms: 64 + -16x + x2 = -15 + 64 Combine like terms: -15 + 64 = 49 64 + -16x + x2 = 49 Factor a perfect square on the left side: (x + -8)(x + -8) = 49 Calculate the square root of the right side: 7 Break this problem into two subproblems by setting (x + -8) equal to 7 and -7.Subproblem 1
x + -8 = 7 Simplifying x + -8 = 7 Reorder the terms: -8 + x = 7 Solving -8 + x = 7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = 7 + 8 Combine like terms: -8 + 8 = 0 0 + x = 7 + 8 x = 7 + 8 Combine like terms: 7 + 8 = 15 x = 15 Simplifying x = 15Subproblem 2
x + -8 = -7 Simplifying x + -8 = -7 Reorder the terms: -8 + x = -7 Solving -8 + x = -7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = -7 + 8 Combine like terms: -8 + 8 = 0 0 + x = -7 + 8 x = -7 + 8 Combine like terms: -7 + 8 = 1 x = 1 Simplifying x = 1Solution
The solution to the problem is based on the solutions from the subproblems. x = {15, 1}
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