How do i simplify (3x-y) (3x+y)

Step-by-step explanation:

alright so first you want to multiply 3x by 3x and y

so far you have 9x^2+3xy

then you do y x 3x and y x y

now you have 9x^2+3xy+3xy+y^2

then you combine like terms to get the final answer of

9x62 + 6x^2y^2 + y^2

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers