Question

Factor the following expression completely: 45x^3y-80xy

Answer 1

Hey Jim, any help?

Answer 2

hey jim look, this is what I got: 45x^3y - 80xy
= 5xy(9x^2 - 16)
=5xy(3x+4)(3x-4)

Answer 3

anyone?:(

Answer 4

or is it =5xy(3x-4)(3x+4)?

Answer 5

yes I did but I dont know if my answer is correct

Answer 6

yea that looks good

Answer 7

so is it 5xy(3x+4)(3x-4) or the other way around 5xy(3x-4)(3x+4)

Answer 8

either of them are good it doesn't matter of the order your binomials are in

Answer 9

oh okay thank you.

Answer 10

No problem good luck

Answer 11

sry was afk for a long while

Answer 12

thanks, hey I have a word problem I need help with:( The area of a rectangular athletic field is represented by the expression 9y^2-25z^2 square meters. Write an algebraic expression to represent one possible set of dimensions (in the sense “length times width”) of the athletic field. Include correct units with your solution. Can anyone help me please? I need it explained to me so I'll know how to do it for finals!:(

Answer 13

Anyone please

Answer 14

using the difference of squares method, we can factor the given expression into


(3y+5z)(3y-5z)


So the dimensions are 3y+5z by 3y-5z


Note: the difference of squares formula is


a^2-b^2 = (a+b)(a-b)


In this case, a = 3y and b = 5z