Question

x squared plus y squared is equal to what if x minus Y is equal to 2 and xy is equal to 99​

Answer 1

Answer:

X2+y-2=202

Step-by-step explanation:

x2+y2=?

x-y=2

x=2+y

xy=99

sub x=2+y

(2+y)y=99

2y+y2=99

y2+2y-99=0

By factorisation method

y2+11y-9y-99=0

y(y+11)-9(y+11)

(y-9)(y+11)

y=9,y=-11(rejected)

sub y=9

x=2+y

x=2+9

x=11

X2+y2

(11)2+(9)2

121+81

202