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Simplifying 3a2 + 6 + -2a2 + 9 + 5a = 0 Reorder the terms: 6 + 9 + 5a + 3a2 + -2a2 = 0 Combine like terms: 6 + 9 = 15 15 + 5a + 3a2 + -2a2 = 0 Combine like terms: 3a2 + -2a2 = 1a2 15 + 5a + 1a2 = 0 Solving 15 + 5a + 1a2 = 0 Solving for variable 'a'. Begin completing the square. Move the constant term to the right: Add '-15' to each side of the equation. 15 + 5a + -15 + a2 = 0 + -15 Reorder the terms: 15 + -15 + 5a + a2 = 0 + -15 Combine like terms: 15 + -15 = 0 0 + 5a + a2 = 0 + -15 5a + a2 = 0 + -15 Combine like terms: 0 + -15 = -15 5a + a2 = -15 The a term is 5a. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5a + 6.25 + a2 = -15 + 6.25 Reorder the terms: 6.25 + 5a + a2 = -15 + 6.25 Combine like terms: -15 + 6.25 = -8.75 6.25 + 5a + a2 = -8.75 Factor a perfect square on the left side: (a + 2.5)(a + 2.5) = -8.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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