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Simplifying (x + 5)(-1x + -5) + 12.25 = 0 Reorder the terms: (5 + x)(-1x + -5) + 12.25 = 0 Reorder the terms: (5 + x)(-5 + -1x) + 12.25 = 0 Multiply (5 + x) * (-5 + -1x) (5(-5 + -1x) + x(-5 + -1x)) + 12.25 = 0 ((-5 * 5 + -1x * 5) + x(-5 + -1x)) + 12.25 = 0 ((-25 + -5x) + x(-5 + -1x)) + 12.25 = 0 (-25 + -5x + (-5 * x + -1x * x)) + 12.25 = 0 (-25 + -5x + (-5x + -1x2)) + 12.25 = 0 Combine like terms: -5x + -5x = -10x (-25 + -10x + -1x2) + 12.25 = 0 Reorder the terms: -25 + 12.25 + -10x + -1x2 = 0 Combine like terms: -25 + 12.25 = -12.75 -12.75 + -10x + -1x2 = 0 Solving -12.75 + -10x + -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'. 12.75 + 10x + x2 = 0 Move the constant term to the right: Add '-12.75' to each side of the equation. 12.75 + 10x + -12.75 + x2 = 0 + -12.75 Reorder the terms: 12.75 + -12.75 + 10x + x2 = 0 + -12.75 Combine like terms: 12.75 + -12.75 = 0.00 0.00 + 10x + x2 = 0 + -12.75 10x + x2 = 0 + -12.75 Combine like terms: 0 + -12.75 = -12.75 10x + x2 = -12.75 The x term is 10x. Take half its coefficient (5). Square it (25) and add it to both sides. Add '25' to each side of the equation. 10x + 25 + x2 = -12.75 + 25 Reorder the terms: 25 + 10x + x2 = -12.75 + 25 Combine like terms: -12.75 + 25 = 12.25 25 + 10x + x2 = 12.25 Factor a perfect square on the left side: (x + 5)(x + 5) = 12.25 Calculate the square root of the right side: 3.5 Break this problem into two subproblems by setting (x + 5) equal to 3.5 and -3.5.Subproblem 1
x + 5 = 3.5 Simplifying x + 5 = 3.5 Reorder the terms: 5 + x = 3.5 Solving 5 + x = 3.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 3.5 + -5 Combine like terms: 5 + -5 = 0 0 + x = 3.5 + -5 x = 3.5 + -5 Combine like terms: 3.5 + -5 = -1.5 x = -1.5 Simplifying x = -1.5Subproblem 2
x + 5 = -3.5 Simplifying x + 5 = -3.5 Reorder the terms: 5 + x = -3.5 Solving 5 + x = -3.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -3.5 + -5 Combine like terms: 5 + -5 = 0 0 + x = -3.5 + -5 x = -3.5 + -5 Combine like terms: -3.5 + -5 = -8.5 x = -8.5 Simplifying x = -8.5Solution
The solution to the problem is based on the solutions from the subproblems. x = {-1.5, -8.5}
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