Question

a+b+c=11 and ab+bc+ca=30. Find a²+b²+c²​

Answer 1

Answer:

61

Step-by-step explanation:

(a+b+c)^2=a^2+b^2+c^2 + 2(ab+bc+ac)

11^2=a^2+b^2+c^2 +2×30

121=a^2+b^2+c^2 + 60

a^2+b^2+c^2=121 - 60

a^2+b^2+c^2=61

hope it hepled.....