find the value of a3 -27 b3 if a-3b = (-6) and ab= (-10)
Answers
Answered by
1
Answer:
Slove ur own its easy....................
Answered by
2
Answer:
We know that a+b=6 and ab=8. Using (a+b)
2
=a
2
+b
2
+2ab, we can find a
2
+b
2
by
a
2
+b
2
=(a+b)
2
−2ab=6
2
−2×8=36−16=20
Now we use
a
3
+b
3
=(a+b)(a
2
+b
2
−ab)=6×(20−8)=6×12=72
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