If 4a - 5b= 16 and ab = 12 then the value of 64a3 - 125b3 is:
Answers
Answered by
1
Answer:
(4a-5b)2=(16)2
16a2+25b2-
Answered by
1
Answer:
The answer is 140 :)
Step-by-step explanation:
64a^3 + 125b^3 = (5)((a+b)^2 - 2ab - ab)
= 5((5)^2 - 3ab)
=5(25 - 3(-1))
= 5(25+3)
= 5(28)
= 140
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