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Simplifying a2 + 8a + 20 = 0 Reorder the terms: 20 + 8a + a2 = 0 Solving 20 + 8a + a2 = 0 Solving for variable 'a'. Begin completing the square. Move the constant term to the right: Add '-20' to each side of the equation. 20 + 8a + -20 + a2 = 0 + -20 Reorder the terms: 20 + -20 + 8a + a2 = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 8a + a2 = 0 + -20 8a + a2 = 0 + -20 Combine like terms: 0 + -20 = -20 8a + a2 = -20 The a term is 8a. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8a + 16 + a2 = -20 + 16 Reorder the terms: 16 + 8a + a2 = -20 + 16 Combine like terms: -20 + 16 = -4 16 + 8a + a2 = -4 Factor a perfect square on the left side: (a + 4)(a + 4) = -4 Can't calculate square root of the right side. The solution to this equation could not be determined.
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