Question

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

Answer 1

Step-by-step explanation:

Formula (a+b+c)

2

=a

2

+b

2

+c

2

+2(ab+bc+ca)

Substituting a+b+c=9;ab+bc+ca=24

9

2

=a

2

+b

2

+c

2

+2(24)

81−48=a

2

+b

2

+c

2

a

2

+b

2

+c

2

=33