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Simplifying a * r2 + b * r + -1c = 0 Multiply a * r2 ar2 + b * r + -1c = 0 Multiply b * r ar2 + br + -1c = 0 Solving ar2 + br + -1c = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1br' to each side of the equation. ar2 + br + -1br + -1c = 0 + -1br Combine like terms: br + -1br = 0 ar2 + 0 + -1c = 0 + -1br ar2 + -1c = 0 + -1br Remove the zero: ar2 + -1c = -1br Add 'c' to each side of the equation. ar2 + -1c + c = -1br + c Combine like terms: -1c + c = 0 ar2 + 0 = -1br + c ar2 = -1br + c Divide each side by 'r2'. a = -1br-1 + cr-2 Simplifying a = -1br-1 + cr-2
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