SOLUTION: use the difference of two squares theorem to find all of the solutions to the following equations: z^2=7

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Question 248478: use the difference of two squares theorem to find all of the solutions to the following equations: z^2=7
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
What does the "difference of two squares" look like.
a^2-b^2
Let's make this equation look like that.
z^2=7
subtract 7 from both sides
z^2-7=0
now apply the theorem
(z-sqrt7)(z+sqrt7)=0
z=sqrt7
z=-sqrt7
http://www.themathpage.com/Alg/difference-two-squares.htm