If a-b = -1
and ab = -12
find a3-b3
Answers
Answered by
1
Answer:
35
Step-by-step explanation:
a-b=-1
ab=-12
(a-b) ²= a²+b²-2ab
a²+b²= (a-b) ²+ 2ab
=-1²+(2×-12)
=1-24= -23
a³-b³= (a-b) (a²+b²+ab)
= -1(-23-12)
=-1×-35
= 35 answer
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