Question 43930
1.3x^2+9x-30 --> (3x-6)(x+5)


2.m^3-27 --> m^3-3^3 ... there is a standard identity for this type of polynomial but i cannot remember it. Look into your text books.


3.4a^4b+32ab^4 --> 4ab(a^3+8b^3) --> 4ab(a^3+2^3b^3) --> 4ab(a^3+(2b)^3). Again the bracket is factorised using the identity used in 2.


4.15t^3-20t^2-20t --> 5t(3t^2-4t-4) --> 5t(3t+2)(t-2)


jon