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Simplifying -16x2 + 25x + 5 = 4 Reorder the terms: 5 + 25x + -16x2 = 4 Solving 5 + 25x + -16x2 = 4 Solving for variable 'x'. Reorder the terms: 5 + -4 + 25x + -16x2 = 4 + -4 Combine like terms: 5 + -4 = 1 1 + 25x + -16x2 = 4 + -4 Combine like terms: 4 + -4 = 0 1 + 25x + -16x2 = 0 Begin completing the square. Divide all terms by -16 the coefficient of the squared term: Divide each side by '-16'. -0.0625 + -1.5625x + x2 = 0 Move the constant term to the right: Add '0.0625' to each side of the equation. -0.0625 + -1.5625x + 0.0625 + x2 = 0 + 0.0625 Reorder the terms: -0.0625 + 0.0625 + -1.5625x + x2 = 0 + 0.0625 Combine like terms: -0.0625 + 0.0625 = 0.0000 0.0000 + -1.5625x + x2 = 0 + 0.0625 -1.5625x + x2 = 0 + 0.0625 Combine like terms: 0 + 0.0625 = 0.0625 -1.5625x + x2 = 0.0625 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 = 0.0625 + 0.6103515625 Reorder the terms: 0.6103515625 + -1.5625x + x2 = 0.0625 + 0.6103515625 Combine like terms: 0.0625 + 0.6103515625 = 0.6728515625 0.6103515625 + -1.5625x + x2 = 0.6728515625 Factor a perfect square on the left side: (x + -0.78125)(x + -0.78125) = 0.6728515625 Calculate the square root of the right side: 0.820275297 Break this problem into two subproblems by setting (x + -0.78125) equal to 0.820275297 and -0.820275297.Subproblem 1
x + -0.78125 = 0.820275297 Simplifying x + -0.78125 = 0.820275297 Reorder the terms: -0.78125 + x = 0.820275297 Solving -0.78125 + x = 0.820275297 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 = 0.820275297 + 0.78125 Combine like terms: -0.78125 + 0.78125 = 0.00000 0.00000 + x = 0.820275297 + 0.78125 x = 0.820275297 + 0.78125 Combine like terms: 0.820275297 + 0.78125 = 1.601525297 x = 1.601525297 Simplifying x = 1.601525297Subproblem 2
x + -0.78125 = -0.820275297 Simplifying x + -0.78125 = -0.820275297 Reorder the terms: -0.78125 + x = -0.820275297 Solving -0.78125 + x = -0.820275297 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 = -0.820275297 + 0.78125 Combine like terms: -0.78125 + 0.78125 = 0.00000 0.00000 + x = -0.820275297 + 0.78125 x = -0.820275297 + 0.78125 Combine like terms: -0.820275297 + 0.78125 = -0.039025297 x = -0.039025297 Simplifying x = -0.039025297Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.601525297, -0.039025297}
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