Question

19 ) What is the value of x2-у? if (x+y) = 9, (х - у) = 4?​

Answer 1

Answer:

x²-y=(13/2)²-5/2

=169/4-5/2

=169-10/4

=159/4✍

Step-by-step explanation:

x+y=9....*x=9-y put in**

x-y=4.....**

9-y-y=4

-2y=4-9

y=5/2 put in*

x=9-5/2

x=18-5/2

x=13/2