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Simplifying (a + -1b)(a + -1b) = 16 Multiply (a + -1b) * (a + -1b) (a(a + -1b) + -1b * (a + -1b)) = 16 ((a * a + -1b * a) + -1b * (a + -1b)) = 16 Reorder the terms: ((-1ab + a2) + -1b * (a + -1b)) = 16 ((-1ab + a2) + -1b * (a + -1b)) = 16 (-1ab + a2 + (a * -1b + -1b * -1b)) = 16 (-1ab + a2 + (-1ab + 1b2)) = 16 Reorder the terms: (-1ab + -1ab + a2 + 1b2) = 16 Combine like terms: -1ab + -1ab = -2ab (-2ab + a2 + 1b2) = 16 Solving -2ab + a2 + 1b2 = 16 Solving for variable 'a'. Reorder the terms: -16 + -2ab + a2 + 1b2 = 16 + -16 Combine like terms: 16 + -16 = 0 -16 + -2ab + a2 + 1b2 = 0 The solution to this equation could not be determined.
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