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Simplifying 2a2 = 5a + -7 + 0 Reorder the terms: 2a2 = -7 + 0 + 5a Combine like terms: -7 + 0 = -7 2a2 = -7 + 5a Solving 2a2 = -7 + 5a Solving for variable 'a'. Reorder the terms: 7 + -5a + 2a2 = -7 + 5a + 7 + -5a Reorder the terms: 7 + -5a + 2a2 = -7 + 7 + 5a + -5a Combine like terms: -7 + 7 = 0 7 + -5a + 2a2 = 0 + 5a + -5a 7 + -5a + 2a2 = 5a + -5a Combine like terms: 5a + -5a = 0 7 + -5a + 2a2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 3.5 + -2.5a + a2 = 0 Move the constant term to the right: Add '-3.5' to each side of the equation. 3.5 + -2.5a + -3.5 + a2 = 0 + -3.5 Reorder the terms: 3.5 + -3.5 + -2.5a + a2 = 0 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + -2.5a + a2 = 0 + -3.5 -2.5a + a2 = 0 + -3.5 Combine like terms: 0 + -3.5 = -3.5 -2.5a + a2 = -3.5 The a term is -2.5a. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5a + 1.5625 + a2 = -3.5 + 1.5625 Reorder the terms: 1.5625 + -2.5a + a2 = -3.5 + 1.5625 Combine like terms: -3.5 + 1.5625 = -1.9375 1.5625 + -2.5a + a2 = -1.9375 Factor a perfect square on the left side: (a + -1.25)(a + -1.25) = -1.9375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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