Question

if a+b+c=9 and ab+bc+ca=23 whatis a^2+b^2+c^2

Answer 1

Answer:

Answer is in the above picture

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Answer 2

Answer:

35

Step-by-step explanation:

use the formula- $(a+b+c)^{2} = a^{2}+b^{2}+c^{2} +2(ab+bc+ca).$

thus, $a^{2} +b^{2} +c^{2}$ = 81 - 46 = 35.

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