If a +6=7 and at = 12 find the value of a3 +b3
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Answered by
1
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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2
Step-by-step explanation:
what the hell is this question?!
doesn't makes any sense
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