Question

find the value of a+b+c,if aa²+b²+c²=45and ab+bc+ca=2​

Answer 1

Answer:

7

Step-by-step explanation:

we know,

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

(a+b+c)^2= 45+2x2

(a+b+c)^2= 49

a+b+c= 7. ANS..