Question

if a+b+c=9and ab+bc+ca=26 find a2+b2+c2​

Answer 1

Answer:

29

Step-by-step explanation:

we knw tht (a+b+c)2 = a2 + b2 + c2 + 2 (ab + bc+ ac)

now 92=a2+b2+c2 +2(26)

81=a2+b2+c2 + 52

81-52=a2+b2+c2

29=a2+b2+c2