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Simplifying a2 + -2a = -4 Reorder the terms: -2a + a2 = -4 Solving -2a + a2 = -4 Solving for variable 'a'. Reorder the terms: 4 + -2a + a2 = -4 + 4 Combine like terms: -4 + 4 = 0 4 + -2a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '-4' to each side of the equation. 4 + -2a + -4 + a2 = 0 + -4 Reorder the terms: 4 + -4 + -2a + a2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -2a + a2 = 0 + -4 -2a + a2 = 0 + -4 Combine like terms: 0 + -4 = -4 -2a + a2 = -4 The a term is -2a. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2a + 1 + a2 = -4 + 1 Reorder the terms: 1 + -2a + a2 = -4 + 1 Combine like terms: -4 + 1 = -3 1 + -2a + a2 = -3 Factor a perfect square on the left side: (a + -1)(a + -1) = -3 Can't calculate square root of the right side. The solution to this equation could not be determined.
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