Math, asked by kg592999, 2 months ago

please find attached and answer​

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Answered by BrainMaster999
1

Step-by-step explanation:

We know the formula,

 {(a + b + c)}^{2}   = {a}^{2}  +  {b}^{2}  +  {c}^{2}  + 2(ab + bc + ca)Therefore, by placing the values, we can say,

 {12}^{2}  =  {a}^{2}  +  {b}^{2}  +  {c}^{2}  \:  + 2(12 + 20 + 15) \\  =  > 144 =  {a}^{2}  +  {b}^{2}  +  {c}^{2}  + 2(47) \\  =  >  {a}^{2}  +  {b}^{2}  +  {c}^{2}  = 144 - 94 \\  =  > {a}^{2}  +  {b}^{2}  +  {c}^{2} = 50(ans.)

Hope this helps you. :)

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