If \(\sqrt {(X-1)(y+2)}\) = 7, x and y being positive whole numbers – InterviewSolution

1.

If \(\sqrt {(X-1)(y+2)}\) = 7, x and y being positive whole numbers, then the values of x and y are respectively(a) 8,5(b) 15,12(c) 22,19(d) 6,8

Answer»

(a) 8, 5

\(\sqrt{(X-1)(y+2)}\) = 7 \(\Rightarrow\) (x - 1) (y + 2) = 7²

\(\Rightarrow\) (x - 1) = 7 and (y + 2) = 7

\(\Rightarrow\) x = 8 and y = 5.

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