Найдите корень уравнения.
а)3х(2х-1)-6х(7+х)=90
б)1,5х(3+2х)=3х(х+1)-30
в)5х(12х-7)-4х(15х-11)=30+29х
г)24х-6х(13х-9)=-13-13х(6х-1)
а)3х(2х-1)-6х(7+х)=90
б)1,5х(3+2х)=3х(х+1)-30
в)5х(12х-7)-4х(15х-11)=30+29х
г)24х-6х(13х-9)=-13-13х(6х-1)
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Answers & Comments
6х^2-3х-42х-6^2=90
45х=90
х=2
б)1,5х(3+2х)=3х(х+1)-30
4,5х+3х^2=3х^2+3х-30
4,5х+3х^2-3х^2-3х=-30
1,5х=-30
х=-20
в) 5х(12х-7)-4х(15х-11)=30+29х
60х^2-35х-60х^2+44х-29х=30
-20х=30
х=-1.5
г)24х-6х(13х-9)=-13-13х(6х-1)
24х-78х^2+54х+78х^2-13х=-13
65х=13
х=-0,2