Question
Factor each trinomial completely.$$ -18 z^{4}+15 z^{3}+12 z^{2} $$
Step 1
In this case, the greatest common factor is $-3z^{2}$. So, we get: $$ -18 z^{4}+15 z^{3}+12 z^{2} = -3z^{2}(6z^{2}-5z-4) $$ Show more…
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