if( a square + b square + c square = 50 )and a + b + c= 12 find ab + bc + ac
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2
Answer:
Step-by-step explanation:
a^2+b^2+c^2=50
a+b+c=12
a(a+b+c)=50
a(12)=50
a=50÷12
a=4.166
Answered by
1
(a+b+c)square =a square +b square +c square +2 (ab+bc+ca)
(12)square =50+2 (ab+bc+ac)
144=50+2 (ab+bc+ac)
94=2 (ab +bc+ca)
ab+bc+ca=47
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