Factorise 3a-27
since 27 = 3*9,
3a-27 = 3a-3*9 = 3(a-9)
To factorize the expression 3a - 27, we can start by noticing that both terms have a common factor of 3. We can factor out the 3, which leaves us with:
3(a - 9)
So the factorized form of 3a - 27 is 3(a - 9).
To arrive at this answer, we identified that both terms have a factor of 3, and therefore, we extracted that common factor. The remaining expression inside the parentheses can't be simplified further, so we left it as (a - 9).