Math, asked by simranrawat44, 9 months ago

provide solutions for this question

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Answered by kamilahmadkhan

0

Answer:

I don;t know

Step-by-step explanation:

Answered by aalmanjawik

0

Answer:

155

Step-by-step explanation:

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

(20)²= +90 + 2(ab+ bc+ ca)

400=90 + 2(ab+ bc+ ca)

400 - 90 =2(ab+ bc+ ca)

310 = 2(ab+ bc+ ca)

(ab + bc + ca) = 310/2

∴(ab + bc + ca) = 155

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