Math, asked by jayapaul0707, 23 days ago

হিসেব করে দেখি, y এর মান কী হলে ( 2,y ) এবং ( 10, -9 ) বিন্দুদ্বয়ের দূরত্ব 10 একক হবে​

Answers

Answered by SHZ123
6

Answer:

Hope it helps

Step-by-step explanation:

Y= -3,-15

You gotta do the rest

Answered by TrustedAnswerer19
56

Answer:

( 2,y ) এবং ( 10, -9 ) বিন্দুদ্বয়ের দূরত্ব d =

d =  \sqrt{ {(2 - 10)}^{2} + ( {y  + 9)}^{2}  }  \\  =   \sqrt{ {8}^{2}  +  {(y + 9)}^{2} }  \\  =  \sqrt{64 +  {y}^{2}  + 18y + 81}  \\ প্রশ্নমতে, \\   \sqrt{64 +  {y}^{2}  + 18y + 81} = 10 \\  \implies \: 64 +  {y}^{2}  + 18y + 81 = 100 \\     \implies \: {y}^{2}  + 18y  + 45 = 0 \\  \implies \: {y}^{2}  + 15y + 3y + 45 = 0 \\  \implies \:y(y + 15) + 3(y + 15) = 0 \\  \implies \:(y + 15)(y + 3)  = 0 \\  \therefore \: y =  - 3 \:  \: or \:  - 15

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