Math, asked by monikajha16, 1 year ago

It x2 — y2 =15, and x + y =3 then x — y is :

Answers

Answered by Amanthelearner
23
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Answered by mysticd
15

Answer:

x - y = 5

Explanation:

_________________________

we know the algebraic identity:

-y² = (x+y)(x-y)

________________________

Given ,

-y² = 15 ----(1)

x+y = 3 ------(2)

Now ,

- = 15

=> (x+y)(x-y) = 15

=> 3 × (x-y) = 15 /*from (1)*/

=> x-y = 15/3

=> x - y = 5

Therefore,

x - y = 5

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