Question

please give me answer fast​

Answer 1

Answer:

here is your answer......

Answer 2

Answer:

1. 84 xy

2. 2b² a²- 2b²

Step-by-step explanation:

1. (3x+7y)² - (3x-7y)²

{(3x +7y)+(3x-7y)}{(3x+7y)-(3x-7y)}

(6x)(14y)

84xy

2. (a²-b²)(a²+b²) - (a²-b²)²

(a²-b²)(a²+b²)-(a²-b²)(a²-b²)

(a²-b²){(a²+b²)-(a²-b²)}

(a²-b²)(2b²)

2b²a²-2b²