Question

x/a + y/b = a + b
x/a^2 + y/b^2 = 2​

Answer 1

x/a^2/ +y/b^2 = 2

now taking square root both side we get....

x/a+ y/b = √ 2

so in eqn ------ 1

it's equal to a+b. so.....

a+b = √ 2