Question

If a + b + c = 11, ab + bc + ca =21, then a + b + c = ?​

Answer 1

a + b + c = 11 as given.

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Answer 2

Answer ⤵️

$answer \: is \: \\ already \: given \: in \: the \: \\ question \: see \: below \: underline \\ \: word \: you \: will \ \\ : get \: answer$

If a + b + c = 11, ab + bc + ca =21, then a + b + c = ?

so your answer will be

$a + b + c = 11$

$\sf\huge\bold\pink{\underbrace{mark\:as\: brainliest}}$