Math, asked by ko0qwbi, 4 months ago

If a²+b²+c²=29 and a+b+c=9; find ab+bc+ca​

Answers

Answered by Anonymous
8

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Since (a+b+c)²=a²+b²+c²+2 (ab+bc+ca)

Therefore (9)²=29+2 (ab+bc+ca)

➡81-29=2(ab+bc+ca)

Therefore, ac+bc+ca=52/2= 26

Hope it helps you...

Answered by nileshgupta121
0

Answer:

  1. a+b+c whole square = a^2+b^2+c^2+2(ab+bc+ca)
  2. 9 whole square =29+2×(ab+bc+ca)
  3. 81=29+2(ab+bc+ca)
  4. 81-29/2=(ab+bc+ca)
  5. 26=(ab+bc+ca)
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