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Simplifying 10x2 + 25x + -88 = 0 Reorder the terms: -88 + 25x + 10x2 = 0 Solving -88 + 25x + 10x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. -8.8 + 2.5x + x2 = 0 Move the constant term to the right: Add '8.8' to each side of the equation. -8.8 + 2.5x + 8.8 + x2 = 0 + 8.8 Reorder the terms: -8.8 + 8.8 + 2.5x + x2 = 0 + 8.8 Combine like terms: -8.8 + 8.8 = 0.0 0.0 + 2.5x + x2 = 0 + 8.8 2.5x + x2 = 0 + 8.8 Combine like terms: 0 + 8.8 = 8.8 2.5x + x2 = 8.8 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 = 8.8 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = 8.8 + 1.5625 Combine like terms: 8.8 + 1.5625 = 10.3625 1.5625 + 2.5x + x2 = 10.3625 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = 10.3625 Calculate the square root of the right side: 3.219083721 Break this problem into two subproblems by setting (x + 1.25) equal to 3.219083721 and -3.219083721.Subproblem 1
x + 1.25 = 3.219083721 Simplifying x + 1.25 = 3.219083721 Reorder the terms: 1.25 + x = 3.219083721 Solving 1.25 + x = 3.219083721 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 = 3.219083721 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 3.219083721 + -1.25 x = 3.219083721 + -1.25 Combine like terms: 3.219083721 + -1.25 = 1.969083721 x = 1.969083721 Simplifying x = 1.969083721Subproblem 2
x + 1.25 = -3.219083721 Simplifying x + 1.25 = -3.219083721 Reorder the terms: 1.25 + x = -3.219083721 Solving 1.25 + x = -3.219083721 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 = -3.219083721 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -3.219083721 + -1.25 x = -3.219083721 + -1.25 Combine like terms: -3.219083721 + -1.25 = -4.469083721 x = -4.469083721 Simplifying x = -4.469083721Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.969083721, -4.469083721}
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