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Simplifying x2 + -10x + 72 = 11 Reorder the terms: 72 + -10x + x2 = 11 Solving 72 + -10x + x2 = 11 Solving for variable 'x'. Reorder the terms: 72 + -11 + -10x + x2 = 11 + -11 Combine like terms: 72 + -11 = 61 61 + -10x + x2 = 11 + -11 Combine like terms: 11 + -11 = 0 61 + -10x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-61' to each side of the equation. 61 + -10x + -61 + x2 = 0 + -61 Reorder the terms: 61 + -61 + -10x + x2 = 0 + -61 Combine like terms: 61 + -61 = 0 0 + -10x + x2 = 0 + -61 -10x + x2 = 0 + -61 Combine like terms: 0 + -61 = -61 -10x + x2 = -61 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 = -61 + 25 Reorder the terms: 25 + -10x + x2 = -61 + 25 Combine like terms: -61 + 25 = -36 25 + -10x + x2 = -36 Factor a perfect square on the left side: (x + -5)(x + -5) = -36 Can't calculate square root of the right side. The solution to this equation could not be determined.
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