Question

If a+b+c=9 and ab+bc+ca=26, find a²+b²+c²​

Answer 1

Answer:

29

Step-by-step explanation:

GIVEN a+b+c=9 and ab+bc+ca=26

BY USING THE ALGEBRAIC FORMULA a²+b²+c²=(a+b+c)²-2(ab+bc+ca)

a²+b²+c²=(9)²-2(26)

a²+b²+c²=81-52

a²+b²+c=29

THEREFORE a²+b²+c²=29