ПОМОГИТЕ ПОЖАЛУЙСТА: решите уравнения
в) (2x-1)+(x+2) (2x-1)=0
г) (2-3x) 2 +(2-3x) * 4x=0
в) (2x-1)+(x+2) (2x-1)=0
г) (2-3x) 2 +(2-3x) * 4x=0
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Answers & Comments
2х-1+2х^2-х+4х-2=0
2х^2+5х-3=0
Д=5^2-4×2×(-3)=1
х1=-5-1/2×2=-6/4=-1,5
х2=-5+1/2×2=-4/4=-1
г)(2-3х)2+(2-3х)4х=0
4-6х+8х-12х^2=0
-12х^2+2х+4=0
Д=2^2-4×(-12)×4=4+192=196=14^2
х1=-2-14/2×(-12)=-16/-24=0,6
х2=-2+14/2×(-12)=12/-24=-0,5