Hey MATE, here is your answer....(3-7a)(3+4a) = 03*(3+4a) -7a(3+4a) =09 + 12a -21A - 28a^2 =09 - 9a -28a^2 =028a^2 + 9a -9 =0So, this is your answerHope it will help you....Keep Asking...If really HELPS you, PLEASE mark as Brainliest.....
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