Education & Reference

Friday, March 27, 2009

Help, I don

I don't understand these, I am suppose to Factoring the differences of squares.





1. x^2-49


2. -16 49h^2


3. 18a^4-72a^2





Please Help me I don't get it. These are my last couple of problems for this section.



1) (x-7)(x 7)


2) did you type that right?


3) below





18a^4 - 72a^2


18a^2 (a^2 - 4)


18a^2 (a-2) (a 2)




q2 rearrange the expression





49h^2 - 16


consider each term as a perfect square


(7h)^2 - 4^2





now you have "The Difference of Two Squares"


factor as in q1... the sum times the difference








"In mathematics you don't understand things. You just get used to them."


John Von Neumann

No comments:

Post a Comment