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Simplifying x2 + 6x + 15 = 8x + -2 Reorder the terms: 15 + 6x + x2 = 8x + -2 Reorder the terms: 15 + 6x + x2 = -2 + 8x Solving 15 + 6x + x2 = -2 + 8x Solving for variable 'x'. Reorder the terms: 15 + 2 + 6x + -8x + x2 = -2 + 8x + 2 + -8x Combine like terms: 15 + 2 = 17 17 + 6x + -8x + x2 = -2 + 8x + 2 + -8x Combine like terms: 6x + -8x = -2x 17 + -2x + x2 = -2 + 8x + 2 + -8x Reorder the terms: 17 + -2x + x2 = -2 + 2 + 8x + -8x Combine like terms: -2 + 2 = 0 17 + -2x + x2 = 0 + 8x + -8x 17 + -2x + x2 = 8x + -8x Combine like terms: 8x + -8x = 0 17 + -2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-17' to each side of the equation. 17 + -2x + -17 + x2 = 0 + -17 Reorder the terms: 17 + -17 + -2x + x2 = 0 + -17 Combine like terms: 17 + -17 = 0 0 + -2x + x2 = 0 + -17 -2x + x2 = 0 + -17 Combine like terms: 0 + -17 = -17 -2x + x2 = -17 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = -17 + 1 Reorder the terms: 1 + -2x + x2 = -17 + 1 Combine like terms: -17 + 1 = -16 1 + -2x + x2 = -16 Factor a perfect square on the left side: (x + -1)(x + -1) = -16 Can't calculate square root of the right side. The solution to this equation could not be determined.
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