Question

if x+y= 4 and x-y=2, then find the value of x²+y²

Answer 1

Answer:

Step-by-step explanation:

Answer 2

x - y = 2

x = 2+y

so (2+y) +y = 4 (using the 1st given eq.)

2y = 2

y = 1

and x = 2 + y

x= 3

now,. ( x )square = 9

(y ) square = 1

so the answer is 9 + 1 =10