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Simplifying 8x2 + 10x = 9 Reorder the terms: 10x + 8x2 = 9 Solving 10x + 8x2 = 9 Solving for variable 'x'. Reorder the terms: -9 + 10x + 8x2 = 9 + -9 Combine like terms: 9 + -9 = 0 -9 + 10x + 8x2 = 0 Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -1.125 + 1.25x + x2 = 0 Move the constant term to the right: Add '1.125' to each side of the equation. -1.125 + 1.25x + 1.125 + x2 = 0 + 1.125 Reorder the terms: -1.125 + 1.125 + 1.25x + x2 = 0 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + 1.25x + x2 = 0 + 1.125 1.25x + x2 = 0 + 1.125 Combine like terms: 0 + 1.125 = 1.125 1.25x + x2 = 1.125 The x term is 1.25x. Take half its coefficient (0.625). Square it (0.390625) and add it to both sides. Add '0.390625' to each side of the equation. 1.25x + 0.390625 + x2 = 1.125 + 0.390625 Reorder the terms: 0.390625 + 1.25x + x2 = 1.125 + 0.390625 Combine like terms: 1.125 + 0.390625 = 1.515625 0.390625 + 1.25x + x2 = 1.515625 Factor a perfect square on the left side: (x + 0.625)(x + 0.625) = 1.515625 Calculate the square root of the right side: 1.231107225 Break this problem into two subproblems by setting (x + 0.625) equal to 1.231107225 and -1.231107225.Subproblem 1
x + 0.625 = 1.231107225 Simplifying x + 0.625 = 1.231107225 Reorder the terms: 0.625 + x = 1.231107225 Solving 0.625 + x = 1.231107225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + x = 1.231107225 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + x = 1.231107225 + -0.625 x = 1.231107225 + -0.625 Combine like terms: 1.231107225 + -0.625 = 0.606107225 x = 0.606107225 Simplifying x = 0.606107225Subproblem 2
x + 0.625 = -1.231107225 Simplifying x + 0.625 = -1.231107225 Reorder the terms: 0.625 + x = -1.231107225 Solving 0.625 + x = -1.231107225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + x = -1.231107225 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + x = -1.231107225 + -0.625 x = -1.231107225 + -0.625 Combine like terms: -1.231107225 + -0.625 = -1.856107225 x = -1.856107225 Simplifying x = -1.856107225Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.606107225, -1.856107225}
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