Question

(3x+4)(3x-5)

Do this with
(a+b)(a-b)=a²-b²​

Answer 1

really it's too difficult

Answer 2

Step-by-step explanation:

$(3x + 4)(3x - 5) \\ = > 3x(3x - 5) + 4(3x - 5)\\ = >9 {x}^{2} - 15x + 12x - 20 \\ = > 9 {x}^{2} - 3x - 20$

It can't be done with a²-b² because the value of b is not equal.Here it is given 4 and 5...

hope it helps....