if a-b=6 and ab=20 find the value of a³-b³?
Answers
Answered by
6
Step-by-step explanation:
Given,
a-b=6
ab=20
(a-b)³ = a³- b³-3 ab(a-b)
(a-b)³= a³-b³-3a²b+3ab²
a³-b³= (a-b³)+3ab(a-b)
=6³+3*20(6)
= 216+360
= 576
so, a³- b³= 576
Answered by
0
Step-by-step explanation:
answer is 576 ......m..... .
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