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Simplifying s2 + 5s = -18 Reorder the terms: 5s + s2 = -18 Solving 5s + s2 = -18 Solving for variable 's'. Reorder the terms: 18 + 5s + s2 = -18 + 18 Combine like terms: -18 + 18 = 0 18 + 5s + s2 = 0 Begin completing the square. Move the constant term to the right: Add '-18' to each side of the equation. 18 + 5s + -18 + s2 = 0 + -18 Reorder the terms: 18 + -18 + 5s + s2 = 0 + -18 Combine like terms: 18 + -18 = 0 0 + 5s + s2 = 0 + -18 5s + s2 = 0 + -18 Combine like terms: 0 + -18 = -18 5s + s2 = -18 The s term is 5s. 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. 5s + 6.25 + s2 = -18 + 6.25 Reorder the terms: 6.25 + 5s + s2 = -18 + 6.25 Combine like terms: -18 + 6.25 = -11.75 6.25 + 5s + s2 = -11.75 Factor a perfect square on the left side: (s + 2.5)(s + 2.5) = -11.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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