Originally Posted by tpoma Just want to double check that I am doing these right. Not looking for an answer. 5p^4q - 20q^3 should = 5pq(p^3-4q^2) right? 72x^2 - 2y^2 should = (2y-3x) (2y-36x) right? Thanks so much! The first one as mentioned above. But this can be factorised further. using the Difference of Two Squares rule.
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