Question

Hi, I have A Dell 22" desktop Monitor of ₹20,999 which I want to sell so, of anyone wants to but it, please tell me...it's urgent...​

Answer 1

Answer:

Step-by-step explanation:

For this you should know the formula for a^2-b^2

(x-3)(x+3)={x}^{2}x

2

-9

Again,

({x}^{2}x

2

-9)({x}^{2}x

2

+9)

={x}^{4}x

4

-81