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Simplifying 8(x + -8) + -6x(x + -5) + 7x = 0 Reorder the terms: 8(-8 + x) + -6x(x + -5) + 7x = 0 (-8 * 8 + x * 8) + -6x(x + -5) + 7x = 0 (-64 + 8x) + -6x(x + -5) + 7x = 0 Reorder the terms: -64 + 8x + -6x(-5 + x) + 7x = 0 -64 + 8x + (-5 * -6x + x * -6x) + 7x = 0 -64 + 8x + (30x + -6x2) + 7x = 0 Reorder the terms: -64 + 8x + 30x + 7x + -6x2 = 0 Combine like terms: 8x + 30x = 38x -64 + 38x + 7x + -6x2 = 0 Combine like terms: 38x + 7x = 45x -64 + 45x + -6x2 = 0 Solving -64 + 45x + -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'. 10.66666667 + -7.5x + x2 = 0 Move the constant term to the right: Add '-10.66666667' to each side of the equation. 10.66666667 + -7.5x + -10.66666667 + x2 = 0 + -10.66666667 Reorder the terms: 10.66666667 + -10.66666667 + -7.5x + x2 = 0 + -10.66666667 Combine like terms: 10.66666667 + -10.66666667 = 0.00000000 0.00000000 + -7.5x + x2 = 0 + -10.66666667 -7.5x + x2 = 0 + -10.66666667 Combine like terms: 0 + -10.66666667 = -10.66666667 -7.5x + x2 = -10.66666667 The x term is -7.5x. Take half its coefficient (-3.75). Square it (14.0625) and add it to both sides. Add '14.0625' to each side of the equation. -7.5x + 14.0625 + x2 = -10.66666667 + 14.0625 Reorder the terms: 14.0625 + -7.5x + x2 = -10.66666667 + 14.0625 Combine like terms: -10.66666667 + 14.0625 = 3.39583333 14.0625 + -7.5x + x2 = 3.39583333 Factor a perfect square on the left side: (x + -3.75)(x + -3.75) = 3.39583333 Calculate the square root of the right side: 1.842778698 Break this problem into two subproblems by setting (x + -3.75) equal to 1.842778698 and -1.842778698.Subproblem 1
x + -3.75 = 1.842778698 Simplifying x + -3.75 = 1.842778698 Reorder the terms: -3.75 + x = 1.842778698 Solving -3.75 + x = 1.842778698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = 1.842778698 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = 1.842778698 + 3.75 x = 1.842778698 + 3.75 Combine like terms: 1.842778698 + 3.75 = 5.592778698 x = 5.592778698 Simplifying x = 5.592778698Subproblem 2
x + -3.75 = -1.842778698 Simplifying x + -3.75 = -1.842778698 Reorder the terms: -3.75 + x = -1.842778698 Solving -3.75 + x = -1.842778698 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = -1.842778698 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = -1.842778698 + 3.75 x = -1.842778698 + 3.75 Combine like terms: -1.842778698 + 3.75 = 1.907221302 x = 1.907221302 Simplifying x = 1.907221302Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.592778698, 1.907221302}
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