SOLUTION: 9) (5z-2)(5z+2)....use foil....need some help here...thanks

Question 175861: 9) (5z-2)(5z+2)....use foil....need some help here...thanks
Found 2 solutions by stanbon, dini:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
(5z-2)(5z+2)....use foil
-----
F: 5z*5z = 25z^2
O: 5z*2 = 10z
I: 5z*-2 =-10z
L: -2*2 = -4
---------------------------
Combine the four results to get:
25z^2 - 4
===============
Cheers,
Stan H.
Answer by dini(5) (Show Source): You can put this solution on YOUR website!
(5z-2)*(5z+2)
=(5z)^2+2(5z)-2(5z)-2*2
=25z^2-4
RELATED QUESTIONS
desperately need some type of help. USE FOIL 8) (7-2y)(10-3y) (answered by nycsub_teacher)
USE FOIL: hello i do not get this at all. I'm lousy at math. can you please help me and... (answered by Mathtut,solver91311)
add... (answered by Fombitz)
Divide. 15z^5 / 5z^2... (answered by josmiceli)
5z^2 - 5z + 4 - (3z -... (answered by checkley71)
Need the area of this right trapezoid: 4z + y -2 3 - x 5z +12 4 + y +2 HELP... (answered by checkley71)
-33<-5z+2<-8 (answered by venugopalramana)
-(3z+2)-5z-18 (answered by rfer)
5z^2+11z+6 (answered by mananth)