14. If a+b+c =6 and a2
+b2
+ c2
=20, find ab+bc+ca.
Answers
Answered by
0
Answer:
8
Step-by-step explanation:
formula is (a+b+c)²=a²+b²+c²+2(ab+bc+ca)
6²= 20+2(x)
36-20=2x
x=16/2=8
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