Question
If `sqrt((x - 1) (y + 2))` = 7, `x` and y being positive whole numbers , then the values of `x` and y respectively are :
Answer: Option A
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`sqrt((x - 1) (y + 2))` = 7 `hArr` (`x - 1 (y + 2)` = `7^2` `hArr` `(x - 1)` = 7 and ( y + 2) = 7
`hArr` `x` = 8 and y = 5.
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