ЧЕРЕЗ ДИСКРИМИНАНТ !!!!
а) (2x-1)(2x+1)+x(x-1)=2x(x+1)
б) (3x+1)^2-x(7x+5)=4
в) x^2+3 корень2x+4=0
г) 4x^2+4 корень 3x+1=0
РЕШИТЕ УРАВНЕНИЯ ПЛИЗ!
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