Math, asked by junaidabdul733, 6 months ago

If a+b+c=10 and ab+bc+ca=25 then find a square + bsquare +c square​

Answers

Answered by Anonymous
2

 {(a + b + c)}^{2}  =  {10}^{2}   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:\\  {a}^{2}  +  {b}^{2}  +  {c}^{2}  + 2ab + 2bc + 2ca =  {10}^{2}  \\ {a}^{2}  +  {b}^{2}  +  {c}^{2}   =  {10}^{2}  - 2(ab + bc + ca) \\ \:  \:  \:  {a}^{2}  +  {b}^{2}  +  {c}^{2}   = 100 - 2 \times 25 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\ {a}^{2}  +  {b}^{2}  +  {c}^{2}   = 50 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

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