Question

if a+b+c=9, ab+bc+ca=26, find a square + b square + c square with full explanation​

Answer 1

Here is your answer buddy

Hope it helps

Answer 2

Answer:

${(a + b + c)}^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2(ab + bc + ca) \\ {(9)}^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2(26) \\ 81 = {a}^{2} + {b}^{2} + {c }^{2} + 52 \\ 29 = {a}^{2} + {b}^{2} + {c}^{2}$