Question

if a + b + c =12 and a square plus b square + c square is equal to 64 find the value of a b + BC + AC ​

Answer 1

Answer:

40

Step-by-step explanation:

Answer 2

Answer:

40

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2(ab+bc+ac)

12²=64+2(ab+bc+ac)

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

40=ab+bc+ac