what is a factor of 9z squared subtract 144

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If you're saying9z-144, then the factor is 9. The factor is any number that you can take out of the equation/expression. For example, 9 goes into 9z once (since 9 times z is 9z) and 9 goes into 144 16 times (9 times 16 is 144).The factored form should be as follows:9(z-16)Hope it helped. x)

=9z^2-144=9(z^2-16)=9(z+4)(z-4)z=4 or z=-4

According to the topic of the video, 9z^2-144 is a difference of squares:3^2 z^2 - 12^2 = (3z-12)(3z+12)this is your answer.Good luck,Kamel

exactly.. all of the above