Posted by **jennifer** on Monday, September 22, 2008 at 9:10am.

factor completely

z^2-18z+81-25x^2

(z-9)^2-(5x)^2

(z-9+5x)(z-9-5x)

am I on the right track?

- MATH -
**bobpursley**, Monday, September 22, 2008 at 9:25am
correct.

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