Question

(a) x2 + y2 = 4 and x + y = 2

Answer 1

x2+y2= 4

2(x+y)=4 (2common)

2×2=4 (x+y=2)

4=4

Answer 2

Answer:

x=0 and y=2

       or

x=2 and y=0

Step-by-step explanation:

$x^2 + y^2 = 4\\x + y = 2\\\\x + y = 2\\=> (x + y)^2 = 2^2\\=>x^2+y^2+2xy=4\\=>4+2xy=4\\=>2xy=0\\=>xy=0\\=>x=0..... or ........y=0\\\\If x=0, then y=2 \\And if y=0,thenx=2$