Question

x/a + y/b =a+b,x/a²+y/b²=2 solve the problem in the method of cross multiplication.

Answer 1

xb+ya=(a+b)ab => bx+ay-(a+b)ab=0


xb²+ya²= 2a²b²=> b²x+a²y-2a²b²=0

cross multiplication

solution