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Mathematics 21 Online
OpenStudy (this):

helpppp

OpenStudy (anonymous):

Your question is?

OpenStudy (this):

4k^2-5k-9 a, not factorable ,b,(k+1)(k-9) c, (4k+3)(k-3) d (k-1)(4k-9)

hero (hero):

4k^2 - 5k - 9 = 4k^2 +4k -9k - 9 = 4k(k - 1) -9(k - 1) = (k - 1)(4k - 9)

OpenStudy (this):

thanks @Hero

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