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Simplifying (3x2 + -4x + 8) + (2x + -7x2 + -5) = 0 Reorder the terms: (8 + -4x + 3x2) + (2x + -7x2 + -5) = 0 Remove parenthesis around (8 + -4x + 3x2) 8 + -4x + 3x2 + (2x + -7x2 + -5) = 0 Reorder the terms: 8 + -4x + 3x2 + (-5 + 2x + -7x2) = 0 Remove parenthesis around (-5 + 2x + -7x2) 8 + -4x + 3x2 + -5 + 2x + -7x2 = 0 Reorder the terms: 8 + -5 + -4x + 2x + 3x2 + -7x2 = 0 Combine like terms: 8 + -5 = 3 3 + -4x + 2x + 3x2 + -7x2 = 0 Combine like terms: -4x + 2x = -2x 3 + -2x + 3x2 + -7x2 = 0 Combine like terms: 3x2 + -7x2 = -4x2 3 + -2x + -4x2 = 0 Solving 3 + -2x + -4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -0.75 + 0.5x + x2 = 0 Move the constant term to the right: Add '0.75' to each side of the equation. -0.75 + 0.5x + 0.75 + x2 = 0 + 0.75 Reorder the terms: -0.75 + 0.75 + 0.5x + x2 = 0 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + 0.5x + x2 = 0 + 0.75 0.5x + x2 = 0 + 0.75 Combine like terms: 0 + 0.75 = 0.75 0.5x + x2 = 0.75 The x term is 0.5x. Take half its coefficient (0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. 0.5x + 0.0625 + x2 = 0.75 + 0.0625 Reorder the terms: 0.0625 + 0.5x + x2 = 0.75 + 0.0625 Combine like terms: 0.75 + 0.0625 = 0.8125 0.0625 + 0.5x + x2 = 0.8125 Factor a perfect square on the left side: (x + 0.25)(x + 0.25) = 0.8125 Calculate the square root of the right side: 0.901387819 Break this problem into two subproblems by setting (x + 0.25) equal to 0.901387819 and -0.901387819.Subproblem 1
x + 0.25 = 0.901387819 Simplifying x + 0.25 = 0.901387819 Reorder the terms: 0.25 + x = 0.901387819 Solving 0.25 + x = 0.901387819 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 0.901387819 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 0.901387819 + -0.25 x = 0.901387819 + -0.25 Combine like terms: 0.901387819 + -0.25 = 0.651387819 x = 0.651387819 Simplifying x = 0.651387819Subproblem 2
x + 0.25 = -0.901387819 Simplifying x + 0.25 = -0.901387819 Reorder the terms: 0.25 + x = -0.901387819 Solving 0.25 + x = -0.901387819 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -0.901387819 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -0.901387819 + -0.25 x = -0.901387819 + -0.25 Combine like terms: -0.901387819 + -0.25 = -1.151387819 x = -1.151387819 Simplifying x = -1.151387819Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.651387819, -1.151387819}
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