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Simplifying x2(x2 + -8) = -1728 Reorder the terms: x2(-8 + x2) = -1728 (-8 * x2 + x2 * x2) = -1728 (-8x2 + x4) = -1728 Solving -8x2 + x4 = -1728 Solving for variable 'x'. Reorder the terms: 1728 + -8x2 + x4 = -1728 + 1728 Combine like terms: -1728 + 1728 = 0 1728 + -8x2 + x4 = 0 Begin completing the square. Move the constant term to the right: Add '-1728' to each side of the equation. 1728 + -8x2 + -1728 + x4 = 0 + -1728 Reorder the terms: 1728 + -1728 + -8x2 + x4 = 0 + -1728 Combine like terms: 1728 + -1728 = 0 0 + -8x2 + x4 = 0 + -1728 -8x2 + x4 = 0 + -1728 Combine like terms: 0 + -1728 = -1728 -8x2 + x4 = -1728 The x term is -8x2. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x2 + 16 + x4 = -1728 + 16 Reorder the terms: 16 + -8x2 + x4 = -1728 + 16 Combine like terms: -1728 + 16 = -1712 16 + -8x2 + x4 = -1712 Factor a perfect square on the left side: (x2 + -4)(x2 + -4) = -1712 Can't calculate square root of the right side. The solution to this equation could not be determined.
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