Question

Factorise: y raised to 3 - 27​

Answer 1

Answer:

y=-3 or y=3

Step-by-step explanation:

y3-27=0

(3)3-y=0

(y+3) (y-3)=0

y+3=0 or y-3=0

y=-3 or y=3

Answer 2

Step-by-step explanation:

Given that:y³-27

It can be written as y³-3³

It is in the form of a³-b3

Here, a= y and b=3

a³-b³=(a-b)(a²+ab+b²)

y³-3³=(y-3)(y²+3y+3²)

y³-27=(y -3)(y²+3y+9)