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Simplifying 16x2 + 25x + -16 = 0 Reorder the terms: -16 + 25x + 16x2 = 0 Solving -16 + 25x + 16x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 16 the coefficient of the squared term: Divide each side by '16'. -1 + 1.5625x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + 1.5625x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + 1.5625x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 1.5625x + x2 = 0 + 1 1.5625x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 1.5625x + x2 = 1 The x term is 1.5625x. Take half its coefficient (0.78125). Square it (0.6103515625) and add it to both sides. Add '0.6103515625' to each side of the equation. 1.5625x + 0.6103515625 + x2 = 1 + 0.6103515625 Reorder the terms: 0.6103515625 + 1.5625x + x2 = 1 + 0.6103515625 Combine like terms: 1 + 0.6103515625 = 1.6103515625 0.6103515625 + 1.5625x + x2 = 1.6103515625 Factor a perfect square on the left side: (x + 0.78125)(x + 0.78125) = 1.6103515625 Calculate the square root of the right side: 1.268996282 Break this problem into two subproblems by setting (x + 0.78125) equal to 1.268996282 and -1.268996282.Subproblem 1
x + 0.78125 = 1.268996282 Simplifying x + 0.78125 = 1.268996282 Reorder the terms: 0.78125 + x = 1.268996282 Solving 0.78125 + x = 1.268996282 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.78125' to each side of the equation. 0.78125 + -0.78125 + x = 1.268996282 + -0.78125 Combine like terms: 0.78125 + -0.78125 = 0.00000 0.00000 + x = 1.268996282 + -0.78125 x = 1.268996282 + -0.78125 Combine like terms: 1.268996282 + -0.78125 = 0.487746282 x = 0.487746282 Simplifying x = 0.487746282Subproblem 2
x + 0.78125 = -1.268996282 Simplifying x + 0.78125 = -1.268996282 Reorder the terms: 0.78125 + x = -1.268996282 Solving 0.78125 + x = -1.268996282 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.78125' to each side of the equation. 0.78125 + -0.78125 + x = -1.268996282 + -0.78125 Combine like terms: 0.78125 + -0.78125 = 0.00000 0.00000 + x = -1.268996282 + -0.78125 x = -1.268996282 + -0.78125 Combine like terms: -1.268996282 + -0.78125 = -2.050246282 x = -2.050246282 Simplifying x = -2.050246282Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.487746282, -2.050246282}
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