Question

if x+y=3 and x-y=-1 then what is the value of xy?​

Answer 1

Step-by-step explanation:

x+y =3

x-y = 1

adding them

2x = 4

x = 2

therefore y= 1

Answer 2

Step-by-step explanation:

x+y=3

x-y=-1

subtract both equations

x+y-(x-y) =3-(-1)

2y=4

y=2

now find x

x+2=3

x=1

now xy

2*1=2 Ans

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