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Simplifying x2 + -10x + 30 = -9 Reorder the terms: 30 + -10x + x2 = -9 Solving 30 + -10x + x2 = -9 Solving for variable 'x'. Reorder the terms: 30 + 9 + -10x + x2 = -9 + 9 Combine like terms: 30 + 9 = 39 39 + -10x + x2 = -9 + 9 Combine like terms: -9 + 9 = 0 39 + -10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-39' to each side of the equation. 39 + -10x + -39 + x2 = 0 + -39 Reorder the terms: 39 + -39 + -10x + x2 = 0 + -39 Combine like terms: 39 + -39 = 0 0 + -10x + x2 = 0 + -39 -10x + x2 = 0 + -39 Combine like terms: 0 + -39 = -39 -10x + x2 = -39 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 = -39 + 25 Reorder the terms: 25 + -10x + x2 = -39 + 25 Combine like terms: -39 + 25 = -14 25 + -10x + x2 = -14 Factor a perfect square on the left side: (x + -5)(x + -5) = -14 Can't calculate square root of the right side. The solution to this equation could not be determined.
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