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Simplifying 4x2 + -10x = 9 Reorder the terms: -10x + 4x2 = 9 Solving -10x + 4x2 = 9 Solving for variable 'x'. Reorder the terms: -9 + -10x + 4x2 = 9 + -9 Combine like terms: 9 + -9 = 0 -9 + -10x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -2.25 + -2.5x + x2 = 0 Move the constant term to the right: Add '2.25' to each side of the equation. -2.25 + -2.5x + 2.25 + x2 = 0 + 2.25 Reorder the terms: -2.25 + 2.25 + -2.5x + x2 = 0 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + -2.5x + x2 = 0 + 2.25 -2.5x + x2 = 0 + 2.25 Combine like terms: 0 + 2.25 = 2.25 -2.5x + x2 = 2.25 The x term is -2.5x. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5x + 1.5625 + x2 = 2.25 + 1.5625 Reorder the terms: 1.5625 + -2.5x + x2 = 2.25 + 1.5625 Combine like terms: 2.25 + 1.5625 = 3.8125 1.5625 + -2.5x + x2 = 3.8125 Factor a perfect square on the left side: (x + -1.25)(x + -1.25) = 3.8125 Calculate the square root of the right side: 1.952562419 Break this problem into two subproblems by setting (x + -1.25) equal to 1.952562419 and -1.952562419.Subproblem 1
x + -1.25 = 1.952562419 Simplifying x + -1.25 = 1.952562419 Reorder the terms: -1.25 + x = 1.952562419 Solving -1.25 + x = 1.952562419 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 1.952562419 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 1.952562419 + 1.25 x = 1.952562419 + 1.25 Combine like terms: 1.952562419 + 1.25 = 3.202562419 x = 3.202562419 Simplifying x = 3.202562419Subproblem 2
x + -1.25 = -1.952562419 Simplifying x + -1.25 = -1.952562419 Reorder the terms: -1.25 + x = -1.952562419 Solving -1.25 + x = -1.952562419 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -1.952562419 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -1.952562419 + 1.25 x = -1.952562419 + 1.25 Combine like terms: -1.952562419 + 1.25 = -0.702562419 x = -0.702562419 Simplifying x = -0.702562419Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.202562419, -0.702562419}
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