Question

If ( x+y=3),( x²+y²=5) then find xy​

Answer 1

Step-by-step explanation:

Given - x+y=3

x^2+y^2=5

xy=?

We know,(x+y)^2=x^2+y^2+2xy

=>(3)^2=5+2xy

=>9-5=2xy

=>4/2=xy

=>xy=2 ans.

Answer 2

Question :

If ( x+y=3),( x²+y²=5) then find xy .

Solution :

》we have two equations here :

x+y=3 _____Equation 1

x²+y²=5_____Equation 2

☆ Squaring Equation 1

=》(x + y )² = (3)²

=》x² + y² + 2xy = 9

=》5 + 2xy = 9 ( from Equation 2 )

=》2xy = 9 - 5

=》2xy = 4

=》xy = 2

Answer :

The value of xy is 2 .