Question

)If x2 + y2 =51 and x – y = 7, find the value of xy.

Answer 1

x-y=7

on squaring both sides

(x-y)^2=7^2

x2+y2-2xy=49

since x2+y2=51,

putting the value,we get

51-2xy=49

-2xy= -2

xy =1

Answer 2

Step-by-step explanation:

If x+y=9 and x² + y²=51

Find the following.

(a.) xy