Question

Сократите дробь:
$frac{(a-b)^2-(a+b)^2}{ab}$
Заранее благодарен!!!

Answer 1

1) ( A - B)^2 - ( A + B)^2 = A^2 - 2AB + B^2 - ( A^2 + 2AB + B^2) =
= A^2 - 2AB + B^2 - A^2 - 2AB - B^2 = - 4AB 
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2) ( - 4AB ) / AB = ( - 4 )

Answer 2

=(a²-2ab+b²-a²-2ab-b²)/ab=-4ab/ab=-4