Question

factorise by regrouping :




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Answer 1

(v)
$14(3y - 5z) ^{2} - 21 {(5z - 3y)}^{3} \\ = 14 {(5z - 3y)}^{2} - 21 {(5z - 3y)}^{3} \\ = 7(5z - 3y) ^{2} (2 - 3(5z - 3y)) \\ = 7(5z - 3y) ^{2} (9y - 15z + 2)$
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Answer 2

here is answer explained ..
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