Question

a2-b2/2a2*a/4a+4b=???

Answer 1

(а²-b²)/2a² * a/(4a+4b)= (a-b)(a+b)/2a²  *  a/4(a +b) =  (a-b)/8а

Answer 2

При а-1 b-9

Answer 3

а = 1, b = 9? Тогда ответ: (1 -9)/(8*1) = -1