Question

1)factories it x2- 9​

Answer 1

= x² – 9

= x² – 3²

= ( x – 3 ) ( x + 3 )

{Using a² – b² = ( a + b ) ( a – b ) }

Answer 2

x²-9

(x)²-(3)²

We know that a²-b²=(a-b)(a+b)

=>(x-3)(x+3)