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Simplifying 5a + -1a2 = 40 Solving 5a + -1a2 = 40 Solving for variable 'a'. Reorder the terms: -40 + 5a + -1a2 = 40 + -40 Combine like terms: 40 + -40 = 0 -40 + 5a + -1a2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 40 + -5a + a2 = 0 Move the constant term to the right: Add '-40' to each side of the equation. 40 + -5a + -40 + a2 = 0 + -40 Reorder the terms: 40 + -40 + -5a + a2 = 0 + -40 Combine like terms: 40 + -40 = 0 0 + -5a + a2 = 0 + -40 -5a + a2 = 0 + -40 Combine like terms: 0 + -40 = -40 -5a + a2 = -40 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 = -40 + 6.25 Reorder the terms: 6.25 + -5a + a2 = -40 + 6.25 Combine like terms: -40 + 6.25 = -33.75 6.25 + -5a + a2 = -33.75 Factor a perfect square on the left side: (a + -2.5)(a + -2.5) = -33.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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