Question

Ifx-y=7 and xy = 9. then the value of (x - y) is​

Answer 1

x + y = 7

xy = 9

$( {x - y})^{2} = ( {x + y})^{2} - 4xy$

$( {x - y})^{2} = {7}^{2} - (4 \times 9)$

$x - y = \sqrt{49 - 36}$

$x - y = \sqrt{13}$

Answer 2

Step-by-step explanation:

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