Question

if a+b+c =12anda^2+b^2 +c^2 = 64 find the value of ab+bc+ac​

Answer 1

Answer:40

Step-by-step explanation:a+b+c=12

(a+b+c)^2=(12)^2

a^2+b^2+c^2+2 (ab+bc+ac)=144

64+2 (ab+bc+ac)=144

2 (ab+bc+ac)=144-64=80

ab+bc+ac=80÷2=40