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Simplifying (x2 + 3x + -5) + (-3x2 + 8x + 9) = 0 Reorder the terms: (-5 + 3x + x2) + (-3x2 + 8x + 9) = 0 Remove parenthesis around (-5 + 3x + x2) -5 + 3x + x2 + (-3x2 + 8x + 9) = 0 Reorder the terms: -5 + 3x + x2 + (9 + 8x + -3x2) = 0 Remove parenthesis around (9 + 8x + -3x2) -5 + 3x + x2 + 9 + 8x + -3x2 = 0 Reorder the terms: -5 + 9 + 3x + 8x + x2 + -3x2 = 0 Combine like terms: -5 + 9 = 4 4 + 3x + 8x + x2 + -3x2 = 0 Combine like terms: 3x + 8x = 11x 4 + 11x + x2 + -3x2 = 0 Combine like terms: x2 + -3x2 = -2x2 4 + 11x + -2x2 = 0 Solving 4 + 11x + -2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -2 + -5.5x + x2 = 0 Move the constant term to the right: Add '2' to each side of the equation. -2 + -5.5x + 2 + x2 = 0 + 2 Reorder the terms: -2 + 2 + -5.5x + x2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -5.5x + x2 = 0 + 2 -5.5x + x2 = 0 + 2 Combine like terms: 0 + 2 = 2 -5.5x + x2 = 2 The x term is -5.5x. Take half its coefficient (-2.75). Square it (7.5625) and add it to both sides. Add '7.5625' to each side of the equation. -5.5x + 7.5625 + x2 = 2 + 7.5625 Reorder the terms: 7.5625 + -5.5x + x2 = 2 + 7.5625 Combine like terms: 2 + 7.5625 = 9.5625 7.5625 + -5.5x + x2 = 9.5625 Factor a perfect square on the left side: (x + -2.75)(x + -2.75) = 9.5625 Calculate the square root of the right side: 3.092329219 Break this problem into two subproblems by setting (x + -2.75) equal to 3.092329219 and -3.092329219.Subproblem 1
x + -2.75 = 3.092329219 Simplifying x + -2.75 = 3.092329219 Reorder the terms: -2.75 + x = 3.092329219 Solving -2.75 + x = 3.092329219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = 3.092329219 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = 3.092329219 + 2.75 x = 3.092329219 + 2.75 Combine like terms: 3.092329219 + 2.75 = 5.842329219 x = 5.842329219 Simplifying x = 5.842329219Subproblem 2
x + -2.75 = -3.092329219 Simplifying x + -2.75 = -3.092329219 Reorder the terms: -2.75 + x = -3.092329219 Solving -2.75 + x = -3.092329219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = -3.092329219 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = -3.092329219 + 2.75 x = -3.092329219 + 2.75 Combine like terms: -3.092329219 + 2.75 = -0.342329219 x = -0.342329219 Simplifying x = -0.342329219Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.842329219, -0.342329219}
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