Math, asked by mehreen05, 5 months ago

১১. a + b + c = 6 এবং a2 + b2 + c2 = 14 হলে, (a – b)2 + (b - c)2 + (c– a)2 = কত?​

Answers

Answered by rajasree45
3

Answer:

6

Step-by-step explanation:

দেওয়া আছে, a + b + c = 6 a2+b2+c2=14

আমরা জানি,

বা,(a+b+c)2=a2+b2+c2+2(ab+bc+ca)

বা, (6)2=14+2(ab+bc+ca) [মান বসিয়ে]

বা, 36=14+2(ab+bc+ca)

বা, 2(ab+bc+ca)=36−14

বা, 2(ab+bc+ca)=22

:. ab + bc + ca = 11

প্রদত্ত রাশি

=(a−b)2+(b−c)2+(c−a)2

=a2−2ab+b2+b2−2bc+c2+c2−2ca+a2

=2(a2+b2+c2)−2(ab+bc+ca)

=(2×14)−(2×11) [মান বসিয়ে]

=28−22

= 6 (Ans)

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