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Simplifying 8x + 1 = x2 + 4 Reorder the terms: 1 + 8x = x2 + 4 Reorder the terms: 1 + 8x = 4 + x2 Solving 1 + 8x = 4 + x2 Solving for variable 'x'. Reorder the terms: 1 + -4 + 8x + -1x2 = 4 + x2 + -4 + -1x2 Combine like terms: 1 + -4 = -3 -3 + 8x + -1x2 = 4 + x2 + -4 + -1x2 Reorder the terms: -3 + 8x + -1x2 = 4 + -4 + x2 + -1x2 Combine like terms: 4 + -4 = 0 -3 + 8x + -1x2 = 0 + x2 + -1x2 -3 + 8x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -3 + 8x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 3 + -8x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + -8x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + -8x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -8x + x2 = 0 + -3 -8x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 -8x + x2 = -3 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = -3 + 16 Reorder the terms: 16 + -8x + x2 = -3 + 16 Combine like terms: -3 + 16 = 13 16 + -8x + x2 = 13 Factor a perfect square on the left side: (x + -4)(x + -4) = 13 Calculate the square root of the right side: 3.605551275 Break this problem into two subproblems by setting (x + -4) equal to 3.605551275 and -3.605551275.Subproblem 1
x + -4 = 3.605551275 Simplifying x + -4 = 3.605551275 Reorder the terms: -4 + x = 3.605551275 Solving -4 + x = 3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 3.605551275 + 4 Combine like terms: -4 + 4 = 0 0 + x = 3.605551275 + 4 x = 3.605551275 + 4 Combine like terms: 3.605551275 + 4 = 7.605551275 x = 7.605551275 Simplifying x = 7.605551275Subproblem 2
x + -4 = -3.605551275 Simplifying x + -4 = -3.605551275 Reorder the terms: -4 + x = -3.605551275 Solving -4 + x = -3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -3.605551275 + 4 Combine like terms: -4 + 4 = 0 0 + x = -3.605551275 + 4 x = -3.605551275 + 4 Combine like terms: -3.605551275 + 4 = 0.394448725 x = 0.394448725 Simplifying x = 0.394448725Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.605551275, 0.394448725}
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