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Simplifying 2x + 18 + -7x2 + 3x + -9 = 0 Reorder the terms: 18 + -9 + 2x + 3x + -7x2 = 0 Combine like terms: 18 + -9 = 9 9 + 2x + 3x + -7x2 = 0 Combine like terms: 2x + 3x = 5x 9 + 5x + -7x2 = 0 Solving 9 + 5x + -7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -7 the coefficient of the squared term: Divide each side by '-7'. -1.285714286 + -0.7142857143x + x2 = 0 Move the constant term to the right: Add '1.285714286' to each side of the equation. -1.285714286 + -0.7142857143x + 1.285714286 + x2 = 0 + 1.285714286 Reorder the terms: -1.285714286 + 1.285714286 + -0.7142857143x + x2 = 0 + 1.285714286 Combine like terms: -1.285714286 + 1.285714286 = 0.000000000 0.000000000 + -0.7142857143x + x2 = 0 + 1.285714286 -0.7142857143x + x2 = 0 + 1.285714286 Combine like terms: 0 + 1.285714286 = 1.285714286 -0.7142857143x + x2 = 1.285714286 The x term is -0.7142857143x. Take half its coefficient (-0.3571428572). Square it (0.1275510204) and add it to both sides. Add '0.1275510204' to each side of the equation. -0.7142857143x + 0.1275510204 + x2 = 1.285714286 + 0.1275510204 Reorder the terms: 0.1275510204 + -0.7142857143x + x2 = 1.285714286 + 0.1275510204 Combine like terms: 1.285714286 + 0.1275510204 = 1.4132653064 0.1275510204 + -0.7142857143x + x2 = 1.4132653064 Factor a perfect square on the left side: (x + -0.3571428572)(x + -0.3571428572) = 1.4132653064 Calculate the square root of the right side: 1.188808356 Break this problem into two subproblems by setting (x + -0.3571428572) equal to 1.188808356 and -1.188808356.Subproblem 1
x + -0.3571428572 = 1.188808356 Simplifying x + -0.3571428572 = 1.188808356 Reorder the terms: -0.3571428572 + x = 1.188808356 Solving -0.3571428572 + x = 1.188808356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = 1.188808356 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = 1.188808356 + 0.3571428572 x = 1.188808356 + 0.3571428572 Combine like terms: 1.188808356 + 0.3571428572 = 1.5459512132 x = 1.5459512132 Simplifying x = 1.5459512132Subproblem 2
x + -0.3571428572 = -1.188808356 Simplifying x + -0.3571428572 = -1.188808356 Reorder the terms: -0.3571428572 + x = -1.188808356 Solving -0.3571428572 + x = -1.188808356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = -1.188808356 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = -1.188808356 + 0.3571428572 x = -1.188808356 + 0.3571428572 Combine like terms: -1.188808356 + 0.3571428572 = -0.8316654988 x = -0.8316654988 Simplifying x = -0.8316654988Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.5459512132, -0.8316654988}
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