Question

1. If x+y=7/2andxy=5/2 , then evaluate x-y​

Answer 1

Answer:

3/2

Step-by-step explanation:

Answer 2

Answer:

(x+y)^2= ×^2+y^2+2×y

(7/2)^2=×^2+y^2+2*5/2)

35/4= ×^2 +y^2+5

35/4-5=×^2+y^2

35-20/4=×^2+y^2

15/4=×^2+y^2

(x-y)^2=×^+y^2-2×y

therefore

answer=-root5/2