(x)^(-a) x (x)^(-b) = ___
x^(-(a+b))
x^(-a+b)
x^(a-b)
x^(-a/b)
Solve for x and y:
bxa−ayb+a+b=0,bx−ay+2ab=0.
Factorise : 2a−4b−xa+2bx