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Simplifying x2 = 5(x + -3) Reorder the terms: x2 = 5(-3 + x) x2 = (-3 * 5 + x * 5) x2 = (-15 + 5x) Solving x2 = -15 + 5x Solving for variable 'x'. Reorder the terms: 15 + -5x + x2 = -15 + 5x + 15 + -5x Reorder the terms: 15 + -5x + x2 = -15 + 15 + 5x + -5x Combine like terms: -15 + 15 = 0 15 + -5x + x2 = 0 + 5x + -5x 15 + -5x + x2 = 5x + -5x Combine like terms: 5x + -5x = 0 15 + -5x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-15' to each side of the equation. 15 + -5x + -15 + x2 = 0 + -15 Reorder the terms: 15 + -15 + -5x + x2 = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -5x + x2 = 0 + -15 -5x + x2 = 0 + -15 Combine like terms: 0 + -15 = -15 -5x + x2 = -15 The x term is -5x. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5x + 6.25 + x2 = -15 + 6.25 Reorder the terms: 6.25 + -5x + x2 = -15 + 6.25 Combine like terms: -15 + 6.25 = -8.75 6.25 + -5x + x2 = -8.75 Factor a perfect square on the left side: (x + -2.5)(x + -2.5) = -8.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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