Math, asked by siva211970yahoocom, 1 year ago

if a+b+c=15,a²+b²+c²=175.find ab+bc+ca

punya2895: (a+b+c)^2 = a^2 + b^2 + c^2 + 2(ab+BC+CA)

siva211970yahoocom: can you send me photo for that

punya2895: 225=175 + 2(ab+bc+ca)
ab+bc+ca =25

siva211970yahoocom: no.. how that 225 came

Answers

Answered by brunoconti

Answer:

Step-by-step explanation:

BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST

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siva211970yahoocom: wrong

Answered by patilcourt

Answer:

Step-by-step explanation:(a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2.ca

15²=175+2(ab+bc+ca)

225=175+2(ab+bc+ca)

225-175=2(ab+bc+ca)

50/2=ab+bc+.ca

25=ab+bc+ca

siva211970yahoocom: how that 225 came

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