Question

6. if at b+c=8 and ab+ bc + ca = 30 find a² +b² +c²​

Answer 1

Answer:

formula( a+b+c)²=a²+b²+c²+2(ab+bc+ca)

Step-by-step explanation:

1. a+b+c=8
2. (a+b+c)²=64
3. 64=a²+b²+c²+2(30)
4. a²+b²+c²=4
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