Question

x²+y²if x-y=10and xy=23​

Answer 1

Answer:

146

Step-by-step explanation:

Given- x²+y²,  x-y=10,  xy=23

Solution:-

We know from algebric indentities that,

x²+y²= (x+y)²-2xy  

               or

           (x-y)²+2xy

so, by using the second fromula, we get

(x-y)²+2xy

=(10)²+2×23         ( given that:-x-y=10 and xy=23 )

=100+46

=146