CBSE Class 9 Answered
Asked by kishor.kp14 | 26 Jun, 2019, 04:05: PM
Expert Answer
1) 3a3b - 243ab3
= 3ab(a2 - 81b2)
= 3ab(a - 9b)(a + 9b) ... since x2 - y2 = (x - y)(x + y)
2) x4 - 625
= x4 - 54
= (x2)2 - (52)2
= (x2 - 52)(x2 + 52) ... since (xm)n = xmn
= (x - 5)(x + 5)(x2 + 25) ... since x2 - y2 = (x - y)(x + y)
Answered by Yasmeen Khan | 26 Jun, 2019, 05:39: PM
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