Question

factorise a²-4 using identity (x²-y²)​

Answer 1

Answer:

a²-4=(a+2)(a-2)

Step-by-step explanation:

WE KNOW THAT

(x²-y²)​=(X+Y)(X-Y)

HERE

X=a

Y=2

SUBSTITUTE THE GIVEN VALUES IN THE FORMULA

a²-4=(a+2)(a-2)

HOPE THIS IS HELPFUL...