Question

8-27a cube-36a+54a square
Factorise

Answer 1

You should use the formula

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

Here the question is in the RHS form

So,

-27a^3+54a^2-36a+8

= (-3a)^3 + 3x(-3a)^2 x(2)+3x(-3a)x(2)^2+(2)^3

=(-3a+2)^3

Note: ^ stands for to the power of

hope this helps...

Answer 2

(2-3a)^3............