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Simplifying x2 + rx + s = 0 Reorder the terms: rx + s + x2 = 0 Solving rx + s + x2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1s' to each side of the equation. rx + s + -1s + x2 = 0 + -1s Combine like terms: s + -1s = 0 rx + 0 + x2 = 0 + -1s rx + x2 = 0 + -1s Remove the zero: rx + x2 = -1s Add '-1x2' to each side of the equation. rx + x2 + -1x2 = -1s + -1x2 Combine like terms: x2 + -1x2 = 0 rx + 0 = -1s + -1x2 rx = -1s + -1x2 Divide each side by 'x'. r = -1sx-1 + -1x Simplifying r = -1sx-1 + -1x
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