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Simplifying 8x2 + 3x + -12 = 0 Reorder the terms: -12 + 3x + 8x2 = 0 Solving -12 + 3x + 8x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -1.5 + 0.375x + x2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + 0.375x + 1.5 + x2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + 0.375x + x2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + 0.375x + x2 = 0 + 1.5 0.375x + x2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 0.375x + x2 = 1.5 The x term is 0.375x. Take half its coefficient (0.1875). Square it (0.03515625) and add it to both sides. Add '0.03515625' to each side of the equation. 0.375x + 0.03515625 + x2 = 1.5 + 0.03515625 Reorder the terms: 0.03515625 + 0.375x + x2 = 1.5 + 0.03515625 Combine like terms: 1.5 + 0.03515625 = 1.53515625 0.03515625 + 0.375x + x2 = 1.53515625 Factor a perfect square on the left side: (x + 0.1875)(x + 0.1875) = 1.53515625 Calculate the square root of the right side: 1.239014225 Break this problem into two subproblems by setting (x + 0.1875) equal to 1.239014225 and -1.239014225.Subproblem 1
x + 0.1875 = 1.239014225 Simplifying x + 0.1875 = 1.239014225 Reorder the terms: 0.1875 + x = 1.239014225 Solving 0.1875 + x = 1.239014225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + x = 1.239014225 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + x = 1.239014225 + -0.1875 x = 1.239014225 + -0.1875 Combine like terms: 1.239014225 + -0.1875 = 1.051514225 x = 1.051514225 Simplifying x = 1.051514225Subproblem 2
x + 0.1875 = -1.239014225 Simplifying x + 0.1875 = -1.239014225 Reorder the terms: 0.1875 + x = -1.239014225 Solving 0.1875 + x = -1.239014225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + x = -1.239014225 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + x = -1.239014225 + -0.1875 x = -1.239014225 + -0.1875 Combine like terms: -1.239014225 + -0.1875 = -1.426514225 x = -1.426514225 Simplifying x = -1.426514225Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.051514225, -1.426514225}
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