Question

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

Answer 1

Answer:

-468

Step-by-step explanation:

plz mark me as a brillianiest

Answer 2

Answer:

29

Step-by-step explanation:

(a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca ---------- (1)

Now, (a + b + c)² = (9)² = 81

Equation (1) can be written as (a + b + c)² = a² + b² + c² + 2(ab + bc + ca)

So, 81 = a² + b² + c² + 2(26)

81 = a² + b² + c² + 52

a² + b² + c² = 81 - 52

a² + b² + c² = 29