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Simplifying 6a2 + -19a + -15 = 0 Reorder the terms: -15 + -19a + 6a2 = 0 Solving -15 + -19a + 6a2 = 0 Solving for variable 'a'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -2.5 + -3.166666667a + a2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + -3.166666667a + 2.5 + a2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + -3.166666667a + a2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + -3.166666667a + a2 = 0 + 2.5 -3.166666667a + a2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 -3.166666667a + a2 = 2.5 The a term is -3.166666667a. Take half its coefficient (-1.583333334). Square it (2.506944447) and add it to both sides. Add '2.506944447' to each side of the equation. -3.166666667a + 2.506944447 + a2 = 2.5 + 2.506944447 Reorder the terms: 2.506944447 + -3.166666667a + a2 = 2.5 + 2.506944447 Combine like terms: 2.5 + 2.506944447 = 5.006944447 2.506944447 + -3.166666667a + a2 = 5.006944447 Factor a perfect square on the left side: (a + -1.583333334)(a + -1.583333334) = 5.006944447 Calculate the square root of the right side: 2.237620264 Break this problem into two subproblems by setting (a + -1.583333334) equal to 2.237620264 and -2.237620264.Subproblem 1
a + -1.583333334 = 2.237620264 Simplifying a + -1.583333334 = 2.237620264 Reorder the terms: -1.583333334 + a = 2.237620264 Solving -1.583333334 + a = 2.237620264 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.583333334' to each side of the equation. -1.583333334 + 1.583333334 + a = 2.237620264 + 1.583333334 Combine like terms: -1.583333334 + 1.583333334 = 0.000000000 0.000000000 + a = 2.237620264 + 1.583333334 a = 2.237620264 + 1.583333334 Combine like terms: 2.237620264 + 1.583333334 = 3.820953598 a = 3.820953598 Simplifying a = 3.820953598Subproblem 2
a + -1.583333334 = -2.237620264 Simplifying a + -1.583333334 = -2.237620264 Reorder the terms: -1.583333334 + a = -2.237620264 Solving -1.583333334 + a = -2.237620264 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.583333334' to each side of the equation. -1.583333334 + 1.583333334 + a = -2.237620264 + 1.583333334 Combine like terms: -1.583333334 + 1.583333334 = 0.000000000 0.000000000 + a = -2.237620264 + 1.583333334 a = -2.237620264 + 1.583333334 Combine like terms: -2.237620264 + 1.583333334 = -0.65428693 a = -0.65428693 Simplifying a = -0.65428693Solution
The solution to the problem is based on the solutions from the subproblems. a = {3.820953598, -0.65428693}
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