Question

11) If x-y=7 and xy=9, then x +y?
is equal to fast plsss

Answer 1

Answer:

root85

Step-by-step explanation:

given,

x-y=7 sqarringboth sides

(x-y)²=7²

x²+y²-2xy=49

(x²+y²+2xy)-2xy-2xy=49

(x+y)²-4xy=49

(x+y)²-4×9=49

(x+y)²=49+36

(x+y)²=85

x+y=root85