Question

a square+b square +c square = 20 and a+b+c=0, find ab+ bc+ca​

Answer 1

Answer:

2*2 + 2* (-4) + (-4)*2

4 -8 -8

-12

hope u get it.

Answer 2

Answer:

-10

Step-by-step explanation:

checkout the image for explaination. :)