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Simplifying (5x2 + -7x + -6) + -1(8x2 + 6x + -1) = 0 Reorder the terms: (-6 + -7x + 5x2) + -1(8x2 + 6x + -1) = 0 Remove parenthesis around (-6 + -7x + 5x2) -6 + -7x + 5x2 + -1(8x2 + 6x + -1) = 0 Reorder the terms: -6 + -7x + 5x2 + -1(-1 + 6x + 8x2) = 0 -6 + -7x + 5x2 + (-1 * -1 + 6x * -1 + 8x2 * -1) = 0 -6 + -7x + 5x2 + (1 + -6x + -8x2) = 0 Reorder the terms: -6 + 1 + -7x + -6x + 5x2 + -8x2 = 0 Combine like terms: -6 + 1 = -5 -5 + -7x + -6x + 5x2 + -8x2 = 0 Combine like terms: -7x + -6x = -13x -5 + -13x + 5x2 + -8x2 = 0 Combine like terms: 5x2 + -8x2 = -3x2 -5 + -13x + -3x2 = 0 Solving -5 + -13x + -3x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-1'. -1(5 + 13x + 3x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(5 + 13x + 3x2)' equal to zero and attempt to solve: Simplifying 5 + 13x + 3x2 = 0 Solving 5 + 13x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 1.666666667 + 4.333333333x + x2 = 0 Move the constant term to the right: Add '-1.666666667' to each side of the equation. 1.666666667 + 4.333333333x + -1.666666667 + x2 = 0 + -1.666666667 Reorder the terms: 1.666666667 + -1.666666667 + 4.333333333x + x2 = 0 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + 4.333333333x + x2 = 0 + -1.666666667 4.333333333x + x2 = 0 + -1.666666667 Combine like terms: 0 + -1.666666667 = -1.666666667 4.333333333x + x2 = -1.666666667 The x term is 4.333333333x. Take half its coefficient (2.166666667). Square it (4.694444446) and add it to both sides. Add '4.694444446' to each side of the equation. 4.333333333x + 4.694444446 + x2 = -1.666666667 + 4.694444446 Reorder the terms: 4.694444446 + 4.333333333x + x2 = -1.666666667 + 4.694444446 Combine like terms: -1.666666667 + 4.694444446 = 3.027777779 4.694444446 + 4.333333333x + x2 = 3.027777779 Factor a perfect square on the left side: (x + 2.166666667)(x + 2.166666667) = 3.027777779 Calculate the square root of the right side: 1.740051085 Break this problem into two subproblems by setting (x + 2.166666667) equal to 1.740051085 and -1.740051085.Subproblem 1
x + 2.166666667 = 1.740051085 Simplifying x + 2.166666667 = 1.740051085 Reorder the terms: 2.166666667 + x = 1.740051085 Solving 2.166666667 + x = 1.740051085 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.166666667' to each side of the equation. 2.166666667 + -2.166666667 + x = 1.740051085 + -2.166666667 Combine like terms: 2.166666667 + -2.166666667 = 0.000000000 0.000000000 + x = 1.740051085 + -2.166666667 x = 1.740051085 + -2.166666667 Combine like terms: 1.740051085 + -2.166666667 = -0.426615582 x = -0.426615582 Simplifying x = -0.426615582Subproblem 2
x + 2.166666667 = -1.740051085 Simplifying x + 2.166666667 = -1.740051085 Reorder the terms: 2.166666667 + x = -1.740051085 Solving 2.166666667 + x = -1.740051085 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.166666667' to each side of the equation. 2.166666667 + -2.166666667 + x = -1.740051085 + -2.166666667 Combine like terms: 2.166666667 + -2.166666667 = 0.000000000 0.000000000 + x = -1.740051085 + -2.166666667 x = -1.740051085 + -2.166666667 Combine like terms: -1.740051085 + -2.166666667 = -3.906717752 x = -3.906717752 Simplifying x = -3.906717752Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.426615582, -3.906717752}Solution
x = {-0.426615582, -3.906717752}
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