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Simplifying (x + 3)(x + 5) = 99 + x(2x + -1) Reorder the terms: (3 + x)(x + 5) = 99 + x(2x + -1) Reorder the terms: (3 + x)(5 + x) = 99 + x(2x + -1) Multiply (3 + x) * (5 + x) (3(5 + x) + x(5 + x)) = 99 + x(2x + -1) ((5 * 3 + x * 3) + x(5 + x)) = 99 + x(2x + -1) ((15 + 3x) + x(5 + x)) = 99 + x(2x + -1) (15 + 3x + (5 * x + x * x)) = 99 + x(2x + -1) (15 + 3x + (5x + x2)) = 99 + x(2x + -1) Combine like terms: 3x + 5x = 8x (15 + 8x + x2) = 99 + x(2x + -1) Reorder the terms: 15 + 8x + x2 = 99 + x(-1 + 2x) 15 + 8x + x2 = 99 + (-1 * x + 2x * x) 15 + 8x + x2 = 99 + (-1x + 2x2) Solving 15 + 8x + x2 = 99 + -1x + 2x2 Solving for variable 'x'. Reorder the terms: 15 + -99 + 8x + x + x2 + -2x2 = 99 + -1x + 2x2 + -99 + x + -2x2 Combine like terms: 15 + -99 = -84 -84 + 8x + x + x2 + -2x2 = 99 + -1x + 2x2 + -99 + x + -2x2 Combine like terms: 8x + x = 9x -84 + 9x + x2 + -2x2 = 99 + -1x + 2x2 + -99 + x + -2x2 Combine like terms: x2 + -2x2 = -1x2 -84 + 9x + -1x2 = 99 + -1x + 2x2 + -99 + x + -2x2 Reorder the terms: -84 + 9x + -1x2 = 99 + -99 + -1x + x + 2x2 + -2x2 Combine like terms: 99 + -99 = 0 -84 + 9x + -1x2 = 0 + -1x + x + 2x2 + -2x2 -84 + 9x + -1x2 = -1x + x + 2x2 + -2x2 Combine like terms: -1x + x = 0 -84 + 9x + -1x2 = 0 + 2x2 + -2x2 -84 + 9x + -1x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 -84 + 9x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 84 + -9x + x2 = 0 Move the constant term to the right: Add '-84' to each side of the equation. 84 + -9x + -84 + x2 = 0 + -84 Reorder the terms: 84 + -84 + -9x + x2 = 0 + -84 Combine like terms: 84 + -84 = 0 0 + -9x + x2 = 0 + -84 -9x + x2 = 0 + -84 Combine like terms: 0 + -84 = -84 -9x + x2 = -84 The x term is -9x. Take half its coefficient (-4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. -9x + 20.25 + x2 = -84 + 20.25 Reorder the terms: 20.25 + -9x + x2 = -84 + 20.25 Combine like terms: -84 + 20.25 = -63.75 20.25 + -9x + x2 = -63.75 Factor a perfect square on the left side: (x + -4.5)(x + -4.5) = -63.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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