Question

if x+y is 4 and xy =2 then find x pwlower 2 +y power 2​

Answer 1

Answer:

x² + y² = 12

Step-by-step explanation:

Given,

(x + y) = 4 ...(i)

and, xy = 2

Squaring equation(i):

(x + y)² = 4²

x² + y² + 2xy = 16

Putting value of xy = 2:

x² + y² + 2*2 = 16

x² + y² = 16 - 4

x² + y² = 12

Answer 2

Step-by-step explanation:

x+y = 4 , xy = 2 , So 2xy = 4

Squaring both sides ,

(x+y)² = 16

x² + y² + 2xy = 16

So x² + y² = 12 ( 2xy = 4)