Question 1116335
factorise completely the following 
a) x^9-y^9
B)x^4-5x^3+5x^2+5x-6
<pre>Correct answers: {{{highlight_green(system(matrix(1,2, "a)", (x - y)(x^2 + xy + y^2)(x^6 + x^3y^3 + y^6)), matrix(1,2, "b)", (x - 3)(x - 1)(x + 1)(x - 2))))}}}