Question

10ab分之3a－3b×a的平方减b的2次方分之25a2方b3方

Answer 1

[(3a-3b)/10ab]*25a^2*b^3/(a^-b^2)

=3(a-b)*25a^2*b^3/[10ab*(a+b)(a-b)]

=3*3a*b^2/2(a+b)

=9ab^2/2(a+b)