1) 3х*(х-2)+5=0,5х*(6х+4)
3х^2-6х+5=3х^2+2х
-6х+5=2х
-6х-2х=-5
-8х=-5
х=-5:(-8)
х=0,625
2) 7х+5/6-4х-1/3=1
7х+5/6-4х-1/3=1
7х+5/5-4х*1/3=1
7х+5/3(5-4х)=1
7х+5=3(5-4х)
7х+5=15-12х
7х+12х=15-5
19х=10
х=10/19
3) x(x-4)+7(x-4)=0
(х-4)(х+7)=0
х-4=0
х=4
х1=4
х+7=0
х=-7
х2=-7
4) 3x^2+9x=0
3х*(х+3)=0
х*(х+3)=0
х=0
х1=0
х+3=0
х=-3
х2=-3
1) 3х*(х-2)+5=0,5х*(6х+4)
3х^2-6х+5=3х^2+2х
-6х+5=2х
-6х-2х=-5
-8х=-5
х=-5:(-8)
х=0,625
2) 7х+5/6-4х-1/3=1
7х+5/6-4х-1/3=1
7х+5/5-4х*1/3=1
7х+5/3(5-4х)=1
7х+5=3(5-4х)
7х+5=15-12х
7х+12х=15-5
19х=10
х=10/19
3) x(x-4)+7(x-4)=0
(х-4)(х+7)=0
х-4=0
х=4
х1=4
х+7=0
х=-7
х2=-7
4) 3x^2+9x=0
3х*(х+3)=0
х*(х+3)=0
х=0
х1=0
х+3=0
х=-3
х2=-3