Question

answer this plz qus 8

Answer 1

ax + ay + bx - by = a^2 - ab + b^2 ____(1)

ax + ay - bx + by = a^2 + ab + b^2____(2)

(1) + (2), a(x+y) = a^2 + b^2__(3)

in (1), b(x-y) = -ab, x-y = a__(4)

by (3) and (4), 2x = (2a^2 + b^2)/2a

y = b^2/2a