Question

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(а) ху
7. If x+y=7 and x-y= 3​

Answer 1

pls tell what we have to find?

its ok.

x+y= 7 and x-y =3

Answer 2

Answer:

10

Step-by-step explanation:

it is the answer if we have to find the value of 'xy'

if not mention it clearly

x + y = 7 __1

x - y = 3 ___2

from 2 we can write x = 3+y__3

so by substituting x = 3+y in 1

we get,

3+2y = 7

2y= 4

y =2

substitute the y value in 2

x - 2 = 3

x = 5

then

xy= 2*5

xy = 10