Question

8a² - 32
factorise using suitable identities​

Answer 1

8a²-32

=8(a²-4)

=8(a²-2²)

=8(a+2)(a-2)

Answer 2

8a² - 32

=8( a² - 4)

=8 [ (a)² - ( 2) ²]

Using identity: a² - b² = ( a+ b) (a-b)

=8 [ ( a+ 2) ( a-2)]

Hope it helps you