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Simplifying 6x2 + -15x + -16 = 0 Reorder the terms: -16 + -15x + 6x2 = 0 Solving -16 + -15x + 6x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -2.666666667 + -2.5x + x2 = 0 Move the constant term to the right: Add '2.666666667' to each side of the equation. -2.666666667 + -2.5x + 2.666666667 + x2 = 0 + 2.666666667 Reorder the terms: -2.666666667 + 2.666666667 + -2.5x + x2 = 0 + 2.666666667 Combine like terms: -2.666666667 + 2.666666667 = 0.000000000 0.000000000 + -2.5x + x2 = 0 + 2.666666667 -2.5x + x2 = 0 + 2.666666667 Combine like terms: 0 + 2.666666667 = 2.666666667 -2.5x + x2 = 2.666666667 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 = 2.666666667 + 1.5625 Reorder the terms: 1.5625 + -2.5x + x2 = 2.666666667 + 1.5625 Combine like terms: 2.666666667 + 1.5625 = 4.229166667 1.5625 + -2.5x + x2 = 4.229166667 Factor a perfect square on the left side: (x + -1.25)(x + -1.25) = 4.229166667 Calculate the square root of the right side: 2.05649378 Break this problem into two subproblems by setting (x + -1.25) equal to 2.05649378 and -2.05649378.Subproblem 1
x + -1.25 = 2.05649378 Simplifying x + -1.25 = 2.05649378 Reorder the terms: -1.25 + x = 2.05649378 Solving -1.25 + x = 2.05649378 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 = 2.05649378 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 2.05649378 + 1.25 x = 2.05649378 + 1.25 Combine like terms: 2.05649378 + 1.25 = 3.30649378 x = 3.30649378 Simplifying x = 3.30649378Subproblem 2
x + -1.25 = -2.05649378 Simplifying x + -1.25 = -2.05649378 Reorder the terms: -1.25 + x = -2.05649378 Solving -1.25 + x = -2.05649378 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 = -2.05649378 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -2.05649378 + 1.25 x = -2.05649378 + 1.25 Combine like terms: -2.05649378 + 1.25 = -0.80649378 x = -0.80649378 Simplifying x = -0.80649378Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.30649378, -0.80649378}
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