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Simplifying 35x2 + 5x + -18 = 0 Reorder the terms: -18 + 5x + 35x2 = 0 Solving -18 + 5x + 35x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 35 the coefficient of the squared term: Divide each side by '35'. -0.5142857143 + 0.1428571429x + x2 = 0 Move the constant term to the right: Add '0.5142857143' to each side of the equation. -0.5142857143 + 0.1428571429x + 0.5142857143 + x2 = 0 + 0.5142857143 Reorder the terms: -0.5142857143 + 0.5142857143 + 0.1428571429x + x2 = 0 + 0.5142857143 Combine like terms: -0.5142857143 + 0.5142857143 = 0.0000000000 0.0000000000 + 0.1428571429x + x2 = 0 + 0.5142857143 0.1428571429x + x2 = 0 + 0.5142857143 Combine like terms: 0 + 0.5142857143 = 0.5142857143 0.1428571429x + x2 = 0.5142857143 The x term is 0.1428571429x. Take half its coefficient (0.07142857145). Square it (0.005102040819) and add it to both sides. Add '0.005102040819' to each side of the equation. 0.1428571429x + 0.005102040819 + x2 = 0.5142857143 + 0.005102040819 Reorder the terms: 0.005102040819 + 0.1428571429x + x2 = 0.5142857143 + 0.005102040819 Combine like terms: 0.5142857143 + 0.005102040819 = 0.519387755119 0.005102040819 + 0.1428571429x + x2 = 0.519387755119 Factor a perfect square on the left side: (x + 0.07142857145)(x + 0.07142857145) = 0.519387755119 Calculate the square root of the right side: 0.720685615 Break this problem into two subproblems by setting (x + 0.07142857145) equal to 0.720685615 and -0.720685615.Subproblem 1
x + 0.07142857145 = 0.720685615 Simplifying x + 0.07142857145 = 0.720685615 Reorder the terms: 0.07142857145 + x = 0.720685615 Solving 0.07142857145 + x = 0.720685615 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.07142857145' to each side of the equation. 0.07142857145 + -0.07142857145 + x = 0.720685615 + -0.07142857145 Combine like terms: 0.07142857145 + -0.07142857145 = 0.00000000000 0.00000000000 + x = 0.720685615 + -0.07142857145 x = 0.720685615 + -0.07142857145 Combine like terms: 0.720685615 + -0.07142857145 = 0.64925704355 x = 0.64925704355 Simplifying x = 0.64925704355Subproblem 2
x + 0.07142857145 = -0.720685615 Simplifying x + 0.07142857145 = -0.720685615 Reorder the terms: 0.07142857145 + x = -0.720685615 Solving 0.07142857145 + x = -0.720685615 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.07142857145' to each side of the equation. 0.07142857145 + -0.07142857145 + x = -0.720685615 + -0.07142857145 Combine like terms: 0.07142857145 + -0.07142857145 = 0.00000000000 0.00000000000 + x = -0.720685615 + -0.07142857145 x = -0.720685615 + -0.07142857145 Combine like terms: -0.720685615 + -0.07142857145 = -0.79211418645 x = -0.79211418645 Simplifying x = -0.79211418645Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.64925704355, -0.79211418645}
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