Question

factorise a) x 3 + 216y 3 + 823 − 36xyz b) a 3 − 64b 3 − 27c 3 − 36abc

Answer 1

i) x3 + 216y3 + 8z3 – 36xyz (ii) a3 – 64b3 – 27c3 – 36abc ... Put the value in the formula a^3+b^3+c^3-abc