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Simplifying x2 + -8x + 73 = -4 Reorder the terms: 73 + -8x + x2 = -4 Solving 73 + -8x + x2 = -4 Solving for variable 'x'. Reorder the terms: 73 + 4 + -8x + x2 = -4 + 4 Combine like terms: 73 + 4 = 77 77 + -8x + x2 = -4 + 4 Combine like terms: -4 + 4 = 0 77 + -8x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-77' to each side of the equation. 77 + -8x + -77 + x2 = 0 + -77 Reorder the terms: 77 + -77 + -8x + x2 = 0 + -77 Combine like terms: 77 + -77 = 0 0 + -8x + x2 = 0 + -77 -8x + x2 = 0 + -77 Combine like terms: 0 + -77 = -77 -8x + x2 = -77 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = -77 + 16 Reorder the terms: 16 + -8x + x2 = -77 + 16 Combine like terms: -77 + 16 = -61 16 + -8x + x2 = -61 Factor a perfect square on the left side: (x + -4)(x + -4) = -61 Can't calculate square root of the right side. The solution to this equation could not be determined.
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