Question

answer this question​

Answer 1

Answer:

hy

Step-by-step explanation:

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Answer 2

Given:-

• a + b + c = 9
• ab + bc + ca = 26

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To find:-

• a² + b² + c² =

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Solution:-

According to the question

As we know that,

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

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

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

Now,

→ a² + b² + c² = (9)² - 2(26)

→ a² + b² + c² = 81 - 52

→ a² + b² + c² = 29

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Hence,

• a² + b² + c² = 29

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Therefore,

• Option (c) is correct.