Question

Simplify: (9x - 11y) ( 9x + 11y)​

Answer 1

Answer:

(

9

−

1

1

)

(

9

+

1

1

)

(9x-11y)(9x+11y)

(9x−11y)(9x+11y)

Simplify

1

Distribute

(

9

−

1

1

)

(

9

+

1

1

)

{\color{#c92786}{(9x-11y)(9x+11y)}}

(9x−11y)(9x+11y)

9

(

9

+

1

1

)

−

1

1

(

9

+

1

1

)

Answer 2

$(9x - 11y)(9x + 11y) \\ = {(9x)}^{2} - {(11y)}^{2} \\ = 81 {x}^{2} - 121 {y}^{2}$