Question

a+b+c =4 and ab+bc+ca =4 then aa²+b²+c² is​

Answer 1

Answer:

Step 1 : Opening the Formula

(a + b + c) ^2 = a^2 + b^2 + c^2 + 2ab+ 2bc + 2ca

Step 2 : putting the values.

(4)^2 = a^2 + b^2 + c^2 + 2(4)

16 = a^2 + b^2 + c^2 + 8

16 - 8 = a^2 + b^2 + c^2

8 = a^2 + b^2 + c^2

Answer is 8.