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Simplifying 4a2 + 4a = -15 Reorder the terms: 4a + 4a2 = -15 Solving 4a + 4a2 = -15 Solving for variable 'a'. Reorder the terms: 15 + 4a + 4a2 = -15 + 15 Combine like terms: -15 + 15 = 0 15 + 4a + 4a2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 3.75 + a + a2 = 0 Move the constant term to the right: Add '-3.75' to each side of the equation. 3.75 + a + -3.75 + a2 = 0 + -3.75 Reorder the terms: 3.75 + -3.75 + a + a2 = 0 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + a + a2 = 0 + -3.75 a + a2 = 0 + -3.75 Combine like terms: 0 + -3.75 = -3.75 a + a2 = -3.75 The a term is a. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + a2 = -3.75 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + a2 = -3.75 + 0.25 Combine like terms: -3.75 + 0.25 = -3.5 1.25 + a2 = -3.5 Factor a perfect square on the left side: (a + 0.5)(a + 0.5) = -3.5 Can't calculate square root of the right side. The solution to this equation could not be determined.
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