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Simplifying -4 = 2a2 + -3a Reorder the terms: -4 = -3a + 2a2 Solving -4 = -3a + 2a2 Solving for variable 'a'. Reorder the terms: -4 + 3a + -2a2 = -3a + 3a + 2a2 + -2a2 Combine like terms: -3a + 3a = 0 -4 + 3a + -2a2 = 0 + 2a2 + -2a2 -4 + 3a + -2a2 = 2a2 + -2a2 Combine like terms: 2a2 + -2a2 = 0 -4 + 3a + -2a2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. 2 + -1.5a + a2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + -1.5a + -2 + a2 = 0 + -2 Reorder the terms: 2 + -2 + -1.5a + a2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1.5a + a2 = 0 + -2 -1.5a + a2 = 0 + -2 Combine like terms: 0 + -2 = -2 -1.5a + a2 = -2 The a term is -1.5a. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5a + 0.5625 + a2 = -2 + 0.5625 Reorder the terms: 0.5625 + -1.5a + a2 = -2 + 0.5625 Combine like terms: -2 + 0.5625 = -1.4375 0.5625 + -1.5a + a2 = -1.4375 Factor a perfect square on the left side: (a + -0.75)(a + -0.75) = -1.4375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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