Question

a²-18 + 15 factorise​

Answer 1

a²-18+15

or we can write it as

a²-3

applying (a²-b²)=(a+b)(a-b)

we get

(a²-3)=(a+√3)(a-√3)=0

hence a=√3 or a=-√3

Answer 2

Hey...

Here's your answer in the attachment...

Hope this helps...!!!