Question

find the product of (x+7)(x-7)

Answer 1

ok do you know how to FOIL?

Answer 2

stands for:
First
Outer
Inner
Last

Answer 3

um i think so can show me.

Answer 4

x^2-49

Answer 5

r u sure thats right

Answer 6

yes absolutely(:

(x+7)(x-7)
so our first number will be: x^2
then we do our Outer which will be x times -7 so we get -7x
Inner will be 7x
and last will be -49

Answer 7

thank u :) i have more questions ok

Answer 8

put it together and you get x^2-7x+7x-49
as you see the 7x cancels out and you get x^2-49

Answer 9

thanks :)

Answer 10

no problem!

Answer 11

okay what about this one (2x-5y)exponent 2

Answer 12

rewrite like this:
(2x-5y)(2x-5y)
then do FOIL. try it and ill check your work if you want

Answer 13

ok

Answer 14

okay is it 4x\[4x ^{2}-25\]

Answer 15

y

Answer 16

let me check...

Answer 17

ok

Answer 18

4x-10xy-10yx+25y^s
answer: 4x-20xy+25y^2

Answer 19

thank you :)

Answer 20

no problem!