Saved Bookmarks
| 1. |
17. Solve If a+b+c=9 and ab + bc + ca = 26, find a + b + c |
|
Answer» Given, a+B+c=9 and ab+bc+ca=26.We KNOW, (a+b+c) 2 =a 2 +b 2 +c 2 +2ab+2bc+2ca⇒(a+b+c) 2 =a 2 +b 2 +c 2 +2(ab+bc+ca).Putting the VALUES here, we get,(9) 2 =a 2 +b 2 +c 2 +2(26)⇒81=a 2 +b 2 +c 2 +52⇒a 2 +b 2 +c 2 =81−52=29.Step-by-step explanation:hope it is useful.please MAKE me brainliest |
|