1.

If x+y=5,x-y=7 then find x²-y²​

Answer»

x+y=5-----(1)

x-y=7

-----------

2x=12

x=6

put x=6 in EQUATION (1)

we, get

6+y=5

therefore y= -1

and XSQ=(6)sq

=36

ysq=(-1)sq

=1


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