Jake McDuck is one of Walt Disney's comic book characters. He was born in Glasgow,Scotland on 1832 to "Dirty" Dingus McDuck and Molly Mallard, both working as coal miners at the time. Jake grew up to become a stockyard hand in Glasgow. He lived in the same house as his brother Fergus McDuck and helped Fergus and his wife Downy O'Drake to grow up their children. He settled in McDuck castle along with his brother on 1885. He died sometime between 1900 and 1902. Later his grand-nephew Donald Duck tried to impersonate him.
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... fraction; the common denominator is 4a2. We get
<math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math>
Taking square ...