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Simplifying -1x2 + 4x + 47 = 0 Reorder the terms: 47 + 4x + -1x2 = 0 Solving 47 + 4x + -1x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -47 + -4x + x2 = 0 Move the constant term to the right: Add '47' to each side of the equation. -47 + -4x + 47 + x2 = 0 + 47 Reorder the terms: -47 + 47 + -4x + x2 = 0 + 47 Combine like terms: -47 + 47 = 0 0 + -4x + x2 = 0 + 47 -4x + x2 = 0 + 47 Combine like terms: 0 + 47 = 47 -4x + x2 = 47 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = 47 + 4 Reorder the terms: 4 + -4x + x2 = 47 + 4 Combine like terms: 47 + 4 = 51 4 + -4x + x2 = 51 Factor a perfect square on the left side: (x + -2)(x + -2) = 51 Calculate the square root of the right side: 7.141428429 Break this problem into two subproblems by setting (x + -2) equal to 7.141428429 and -7.141428429.Subproblem 1
x + -2 = 7.141428429 Simplifying x + -2 = 7.141428429 Reorder the terms: -2 + x = 7.141428429 Solving -2 + x = 7.141428429 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 7.141428429 + 2 Combine like terms: -2 + 2 = 0 0 + x = 7.141428429 + 2 x = 7.141428429 + 2 Combine like terms: 7.141428429 + 2 = 9.141428429 x = 9.141428429 Simplifying x = 9.141428429Subproblem 2
x + -2 = -7.141428429 Simplifying x + -2 = -7.141428429 Reorder the terms: -2 + x = -7.141428429 Solving -2 + x = -7.141428429 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -7.141428429 + 2 Combine like terms: -2 + 2 = 0 0 + x = -7.141428429 + 2 x = -7.141428429 + 2 Combine like terms: -7.141428429 + 2 = -5.141428429 x = -5.141428429 Simplifying x = -5.141428429Solution
The solution to the problem is based on the solutions from the subproblems. x = {9.141428429, -5.141428429}
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