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Simplifying 4x2 + 4 = x + 8 Reorder the terms: 4 + 4x2 = x + 8 Reorder the terms: 4 + 4x2 = 8 + x Solving 4 + 4x2 = 8 + x Solving for variable 'x'. Reorder the terms: 4 + -8 + -1x + 4x2 = 8 + x + -8 + -1x Combine like terms: 4 + -8 = -4 -4 + -1x + 4x2 = 8 + x + -8 + -1x Reorder the terms: -4 + -1x + 4x2 = 8 + -8 + x + -1x Combine like terms: 8 + -8 = 0 -4 + -1x + 4x2 = 0 + x + -1x -4 + -1x + 4x2 = x + -1x Combine like terms: x + -1x = 0 -4 + -1x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -1 + -0.25x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + -0.25x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -0.25x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -0.25x + x2 = 0 + 1 -0.25x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -0.25x + x2 = 1 The x term is -0.25x. Take half its coefficient (-0.125). Square it (0.015625) and add it to both sides. Add '0.015625' to each side of the equation. -0.25x + 0.015625 + x2 = 1 + 0.015625 Reorder the terms: 0.015625 + -0.25x + x2 = 1 + 0.015625 Combine like terms: 1 + 0.015625 = 1.015625 0.015625 + -0.25x + x2 = 1.015625 Factor a perfect square on the left side: (x + -0.125)(x + -0.125) = 1.015625 Calculate the square root of the right side: 1.007782219 Break this problem into two subproblems by setting (x + -0.125) equal to 1.007782219 and -1.007782219.Subproblem 1
x + -0.125 = 1.007782219 Simplifying x + -0.125 = 1.007782219 Reorder the terms: -0.125 + x = 1.007782219 Solving -0.125 + x = 1.007782219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = 1.007782219 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = 1.007782219 + 0.125 x = 1.007782219 + 0.125 Combine like terms: 1.007782219 + 0.125 = 1.132782219 x = 1.132782219 Simplifying x = 1.132782219Subproblem 2
x + -0.125 = -1.007782219 Simplifying x + -0.125 = -1.007782219 Reorder the terms: -0.125 + x = -1.007782219 Solving -0.125 + x = -1.007782219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = -1.007782219 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = -1.007782219 + 0.125 x = -1.007782219 + 0.125 Combine like terms: -1.007782219 + 0.125 = -0.882782219 x = -0.882782219 Simplifying x = -0.882782219Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.132782219, -0.882782219}
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