Question

a2 + b2 + c2? a + b+ c =9 and ab + bc + ca = 26

Answer 1

Answer:

#ANSWERWITHQUALITY  #BAL

Step-by-step explanation:

a + b+ c = 9

on squaring,

a² + b² + c² + 2 (ab + bc + ca) = 81

a² + b² + c² + 2 (26) = 81

a² + b² + c² = 81 - 52

                           = 29

Answer 2

Answer:

29

Step-by-step explanation:

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

(9)2= a2 +b2 +c2 + 2 (ab+bc+ca)

81=a2+b2+c2+2(26)

81= a2+b2+c2+52

81-52 = a2+b2+c2

29= a2+b2+c2

hope it helps