MCQ
If $\text{a}+\text{b}+\text{c}=10$ and $\text{a}^2+\text{b}^2+\text{c}^2=36$ then $\text{ab}+\text{bc}+\text{ca}=\text{________}$
- A$136$
- B$64$
- ✓$32$
- D$68$
✓
Answer
Correct option: C.
$32$
$32$
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