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Mathematics 14 Online
OpenStudy (anonymous):

Simplify the rational expression. State any excluded values.

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

factor the numerator, what do you get?

OpenStudy (anonymous):

What do I minus 36 by? @jim_thompson5910

jimthompson5910 (jim_thompson5910):

use the difference of squares factoring rule to factor the numerator

jimthompson5910 (jim_thompson5910):

a^2-b^2 = (a-b)(a+b)

OpenStudy (anonymous):

Im lost........

jimthompson5910 (jim_thompson5910):

x^2 - 36 x^2 - 6^2 use the rule above

OpenStudy (anonymous):

I dont understand

jimthompson5910 (jim_thompson5910):

example: x^2 - 25 x^2 - 5^2 (x-5)(x+5)

jimthompson5910 (jim_thompson5910):

so x^2 - 25 factors to (x-5)(x+5)

jimthompson5910 (jim_thompson5910):

use this example to factor x^2 - 36

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