Question

How to factorise t^2-15

Answer 1

Hey mate!

Here is your answer

t^2 -15 = t^2 - ( root 15)^2

Using identity- a^2 - b^2= (a+ b)(a-b)

We get

(t+ Root 15)(t-root 15)=0

So,

t= -root 15 and root 15