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Simplifying x(x + 7) = 88 Reorder the terms: x(7 + x) = 88 (7 * x + x * x) = 88 (7x + x2) = 88 Solving 7x + x2 = 88 Solving for variable 'x'. Reorder the terms: -88 + 7x + x2 = 88 + -88 Combine like terms: 88 + -88 = 0 -88 + 7x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '88' to each side of the equation. -88 + 7x + 88 + x2 = 0 + 88 Reorder the terms: -88 + 88 + 7x + x2 = 0 + 88 Combine like terms: -88 + 88 = 0 0 + 7x + x2 = 0 + 88 7x + x2 = 0 + 88 Combine like terms: 0 + 88 = 88 7x + x2 = 88 The x term is 7x. Take half its coefficient (3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. 7x + 12.25 + x2 = 88 + 12.25 Reorder the terms: 12.25 + 7x + x2 = 88 + 12.25 Combine like terms: 88 + 12.25 = 100.25 12.25 + 7x + x2 = 100.25 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 100.25 Calculate the square root of the right side: 10.012492197 Break this problem into two subproblems by setting (x + 3.5) equal to 10.012492197 and -10.012492197.Subproblem 1
x + 3.5 = 10.012492197 Simplifying x + 3.5 = 10.012492197 Reorder the terms: 3.5 + x = 10.012492197 Solving 3.5 + x = 10.012492197 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 10.012492197 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 10.012492197 + -3.5 x = 10.012492197 + -3.5 Combine like terms: 10.012492197 + -3.5 = 6.512492197 x = 6.512492197 Simplifying x = 6.512492197Subproblem 2
x + 3.5 = -10.012492197 Simplifying x + 3.5 = -10.012492197 Reorder the terms: 3.5 + x = -10.012492197 Solving 3.5 + x = -10.012492197 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -10.012492197 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -10.012492197 + -3.5 x = -10.012492197 + -3.5 Combine like terms: -10.012492197 + -3.5 = -13.512492197 x = -13.512492197 Simplifying x = -13.512492197Solution
The solution to the problem is based on the solutions from the subproblems. x = {6.512492197, -13.512492197}
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