Question

find a factor of y^3-13y-12 and hence factorise t completely​

Answer 1

Step-by-step explanation:

I THOUGHT THIS IS THE ANSWER

Answer 2

Answer:

(y+1)(y-4)(y+3)

Step-by-step explanation:

Easy to see that y=-1 is a factor

Then, solving as:

• y³-13y-12=
• y³+y²-y²-13y-12 =
• (y³+y²)-(y²+13y+12) =
• y²(y+1) - (y+1)(y+12) =
• (y+1)(y²-y-12) =
• (y+1)(y-4)(y+3)

Hope it helps