Question

if a square + b square + c square is equals to 45 and a b + BC + CA is equal to 38 find the value of a + b + c​

Answer 1

Answer:

(a+b+c)² = a²+b²+c² +2(ab+ab+bc)

(a+b+c)² = 45 +2.38

(a+b+c)² =121

a+b+c = 11

Step-by-step explanation:

(a+b+c)² = a²+b²+c² +2(ab+ab+bc)

Answer 2

Answer:

(a+b+c)2 = a2+b2+c2 + 2(ab+bc+ca)

(a+b+c)2=45+2(38)

=(a+b+c)2=121

(a+b+c)=11

Step-by-step explanation:

Hope you got it