Question

Please solve the problem ​

Answer 1

Answer:

$a) \: \: (3x - 7)(3x + 5) \\ = (9x {}^{2} + 15x - 21x - 35) \\ = (9 {x}^{2} - 6x - 35) \: \: ans\\ \\ b)(7x - 5y)(7x + 5y) \\ = 49 {x}^{2} - 25 {y}^{2} \: ans$

Hey! Mate Here is your solution. Thanks

Answer 2

Answer:

$(a) .\: \: (3x - 7)(3x + 5) \\ \: \: \: \: \: \: \: \: = 9 {x}^{2} + 15x - 21x - 35 \\ \: \: \: \: \: \: \: \: = 9 {x}^{2} - 6x - 35$