(x)^(-a) x (x)^(-b) = ___
(x)^(-{a +b})
(x)^(-a +b)
(x)^(a -b)
(x)^(a/b)
x2+x(a+b)+ab is equal to
x2 + (a + b)x + ab can be factorised as ______ .
The expansion (x+a)(x+b) is
(a+b)(a-b) = ___ .