what made the situation possible
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Let their present ages be x and 20−x yrs respectively.
Four years ago, their ages would be (x-4) and (16-x) yrs respectively.
(x−4)(16−x)=48
16x−x =2 −64+4x=48
x =2−20x+112=0
b 2 −4ac=−48
Since the discriminant <0, the roots would be imaginary.
Hence, such a situation is not possible.
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