Question

simplyfy (x -3) (x + 3) Pls very urgent​

Answer 1

$(x - 3)(x + 3)$

According to the algebraic identity,

$(a + b)(a - b) = {a}^{2} - {b}^{2}$

So,

$(x - 3)(x + 3) \\ = {(x)}^{2} - {(3)}^{2} \\ = {x}^{2} - 9$

Answer 2

Answer:

Given:- (x -3) ( x + 3)

Solution:-

(x -3) ( x + 3)

= ( x) ² - ( 3)² [As it the formulla of (a² - b² )= ( a + b ) ( a -b) ]

= x² - 9

Things to know:-

Formulllas:-

• (a + b) ² = a² + 2ab + b²

• ( a- b)² = a² - 2ab + b²

• ( a² + b² ) = ( a + b ) ² - 2ab

• (a² + b²) = ( a - b)² + 2ab

• (a+b+c)² = (a+b+c)² +2( ab + bc + ca)