put a=-1 b=-2 b²-a³-3a+5a scam=report
Answers
Answered by
1
Answer:
It is verified that (a-b)³ =a³ – 3a²b + 3ab² -b³.
Step-by-step explanation:
a³=(a-b)³ + 3(a-b)²b + 3(a-b)b²+b³ => (a-b)³=a³-3(a-b)²b-3(a-b)b²-b³
=> (a-b)³ = a³-3(a-b)((a-b)b+b²)-b³
=> (a-b)³ = a³-3ab(a-b)-b³
=> (a-b)³ =a³ – 3a²b + 3ab² -b³.
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Answered by
1
Answer:
-9 is the answer
Step-by-step explanation:
b²-a³-3a+5a
put b = -2 , a =-1
(-2)² - (-1)³ - 3(-1) + 5(-1)
= -8 - (-1) +3 -5
= -8 + 1 + 3 -5
= -9
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