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Factorise (i) 4p2 − 9q2 (ii) 63a2 − 112b2 (iii) 49x2 − 36 (iv) 16x5 − 144x3 (v) (l + m)2 − (l − m)2 (vi) 9x2y2 − 16 (vii) (x2 − 2xy + y2) − z2 (viii) 25a2 − 4b2 + 28bc − 49c2 |
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Answer» Factorise (i) 4p2 −
(ii) 63a2
(iii) 49x2
(iv) 16x5
(v) (l + m)2
(vi) 9x2y2
(vii) (x2
(viii) 25a2
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