Question

factorise the following expression in their product from: y²-4​

Answer 1

Answer:

(y+2) (y-2)

Step-by-step explanation:

We know that ..

(a+b) (a-b) = a²- b²

so....

(y+2) (y-2) =y2 - 2²

=y2-4

therefore ans is (y+2) (y-2) ..