2ab(a+b) - ab(a-b)
Expanding the expression:
= 2ab a + 2ab b - ab a + ab b= 2a^2b + 2ab^2 - a^2b + ab^2= 2a^2b - a^2b + 2ab^2 + ab^2= a^2b + 3ab^2
2ab(a+b) - ab(a-b)
Expanding the expression:
= 2ab a + 2ab b - ab a + ab b
= 2a^2b + 2ab^2 - a^2b + ab^2
= 2a^2b - a^2b + 2ab^2 + ab^2
= a^2b + 3ab^2