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Simplifying (5x2 + 3x + -4) + (3x2 + -8x + -2) = 0 Reorder the terms: (-4 + 3x + 5x2) + (3x2 + -8x + -2) = 0 Remove parenthesis around (-4 + 3x + 5x2) -4 + 3x + 5x2 + (3x2 + -8x + -2) = 0 Reorder the terms: -4 + 3x + 5x2 + (-2 + -8x + 3x2) = 0 Remove parenthesis around (-2 + -8x + 3x2) -4 + 3x + 5x2 + -2 + -8x + 3x2 = 0 Reorder the terms: -4 + -2 + 3x + -8x + 5x2 + 3x2 = 0 Combine like terms: -4 + -2 = -6 -6 + 3x + -8x + 5x2 + 3x2 = 0 Combine like terms: 3x + -8x = -5x -6 + -5x + 5x2 + 3x2 = 0 Combine like terms: 5x2 + 3x2 = 8x2 -6 + -5x + 8x2 = 0 Solving -6 + -5x + 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'. -0.75 + -0.625x + x2 = 0 Move the constant term to the right: Add '0.75' to each side of the equation. -0.75 + -0.625x + 0.75 + x2 = 0 + 0.75 Reorder the terms: -0.75 + 0.75 + -0.625x + x2 = 0 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + -0.625x + x2 = 0 + 0.75 -0.625x + x2 = 0 + 0.75 Combine like terms: 0 + 0.75 = 0.75 -0.625x + x2 = 0.75 The x term is -0.625x. Take half its coefficient (-0.3125). Square it (0.09765625) and add it to both sides. Add '0.09765625' to each side of the equation. -0.625x + 0.09765625 + x2 = 0.75 + 0.09765625 Reorder the terms: 0.09765625 + -0.625x + x2 = 0.75 + 0.09765625 Combine like terms: 0.75 + 0.09765625 = 0.84765625 0.09765625 + -0.625x + x2 = 0.84765625 Factor a perfect square on the left side: (x + -0.3125)(x + -0.3125) = 0.84765625 Calculate the square root of the right side: 0.920682491 Break this problem into two subproblems by setting (x + -0.3125) equal to 0.920682491 and -0.920682491.Subproblem 1
x + -0.3125 = 0.920682491 Simplifying x + -0.3125 = 0.920682491 Reorder the terms: -0.3125 + x = 0.920682491 Solving -0.3125 + x = 0.920682491 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3125' to each side of the equation. -0.3125 + 0.3125 + x = 0.920682491 + 0.3125 Combine like terms: -0.3125 + 0.3125 = 0.0000 0.0000 + x = 0.920682491 + 0.3125 x = 0.920682491 + 0.3125 Combine like terms: 0.920682491 + 0.3125 = 1.233182491 x = 1.233182491 Simplifying x = 1.233182491Subproblem 2
x + -0.3125 = -0.920682491 Simplifying x + -0.3125 = -0.920682491 Reorder the terms: -0.3125 + x = -0.920682491 Solving -0.3125 + x = -0.920682491 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3125' to each side of the equation. -0.3125 + 0.3125 + x = -0.920682491 + 0.3125 Combine like terms: -0.3125 + 0.3125 = 0.0000 0.0000 + x = -0.920682491 + 0.3125 x = -0.920682491 + 0.3125 Combine like terms: -0.920682491 + 0.3125 = -0.608182491 x = -0.608182491 Simplifying x = -0.608182491Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.233182491, -0.608182491}
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