present age of father is 3 years less than two times the square of his son's age, difference of their ages is 42
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2x-3 =42
2x=42+3
2x=45
x=45/2
x=22.5
his father age is 2×22.5
=45.0
=45
and his age is 22.5
2x=42+3
2x=45
x=45/2
x=22.5
his father age is 2×22.5
=45.0
=45
and his age is 22.5
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