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Simplifying a2 + -18a + 320 = 0 Reorder the terms: 320 + -18a + a2 = 0 Solving 320 + -18a + a2 = 0 Solving for variable 'a'. Begin completing the square. Move the constant term to the right: Add '-320' to each side of the equation. 320 + -18a + -320 + a2 = 0 + -320 Reorder the terms: 320 + -320 + -18a + a2 = 0 + -320 Combine like terms: 320 + -320 = 0 0 + -18a + a2 = 0 + -320 -18a + a2 = 0 + -320 Combine like terms: 0 + -320 = -320 -18a + a2 = -320 The a term is -18a. Take half its coefficient (-9). Square it (81) and add it to both sides. Add '81' to each side of the equation. -18a + 81 + a2 = -320 + 81 Reorder the terms: 81 + -18a + a2 = -320 + 81 Combine like terms: -320 + 81 = -239 81 + -18a + a2 = -239 Factor a perfect square on the left side: (a + -9)(a + -9) = -239 Can't calculate square root of the right side. The solution to this equation could not be determined.
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