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Mathematics 18 Online
OpenStudy (anonymous):

Factor Completely: x2 − 49

OpenStudy (anonymous):

that is x^2 right?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

(x-7) (x+7)

OpenStudy (anonymous):

first of all do you know how to do this?

OpenStudy (anonymous):

not really I suck at algebra.

OpenStudy (anonymous):

(x + 7)(x - 7). You should use a^2 - b^2 identity.

OpenStudy (anonymous):

hmmm okies

OpenStudy (anonymous):

thank you though.

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

sorry i wrote it wrong

OpenStudy (anonymous):

its only (a^2- b^2)

OpenStudy (anonymous):

49 = 7^2.

OpenStudy (anonymous):

okies from that if you can tell that the looks are similar a^2 - b ^2 x^2 - 49 7 ^ 2 = 49

OpenStudy (anonymous):

ok that looks better lol

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