Ответы и объяснения

2014-04-10T18:39:22+04:00
(2x-5)^2-(2x-3)(2x+3)=0
4x^2 - 20x - 25 - 4x^2 - 9 = 0
-20x = 25 + 9
-20x = 34
x= 34/20
x = 1.7