Автор - malikaasanova92

(у+6)2-(у+5)(у-5)=79

Ответ

Автор - trscott

(у+6)²-(у+5)(у-5)=79

y²+12y+36-(y²-25) = 79

12y= 79 -36 -25 = 18

y = 18/12 = 3/2 = 1,5

Ответ

Автор - blkmrc

(y + 6) {}^{2}  - (y + 5)(y - 5) = 79 \  \  {y}^{2}  + 12y + 36 - ( {y}^{2}  - 25) = 79 \  \  {y}^{2}  + 12y + 36 -  {y}^{2}  + 25 = 79 \  \ 12y + 61 = 79 \  \ 12y = 79 - 61 \ \  12y = 18 \  \ x =  frac{3}{2}  = 1 frac{1}{2}

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