Question

If x + y = 3 , x square + y square = 5 then find xy

Answer 1

Answer:

xy=2

Step-by-step explanation:

x+y=3

=>y=3-x    .....(1)

x²+y²=5    ......(2)

putting value of y from (1) in (2) and solving the equation,

we get x=2, y=1

so xy=2x1=2

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Answer 2

Answer:

2

Step-by-step explanation:

as x+y=3

then

x²+y²=5

add both the side 2xy

x²+2xy+y²=5+2xy

(x+y)²=5+2xy

(3)²=5+2xy

9=5+2xy

9-5=2xy

2xy=4

xy=2