х(14х-9)=0
х=0 и
14х-9=0, 14х=9, х=9/14
16х*2=49
х*2=49/16
х=+-7/4
2х*2-11х+12=0
D= 121-96=25. корень из Д = 5
х1=11+5/4=4
х2=11-5/4=6/4=3/2=1,5
2a^2+2ab-2ac-2ba+2b^2+2bc+2ca-2cb+2c^2=2a^2+2b^2+2c^2.
=50*2sin(arccos(-0,8))cos(arccos(-0,8))=100sin(π-arcsin(sqrt(1-(-0,8)^2)))*(-0,8)=-80sin(arcsin(sqrt(0,36)))=-80sin(arcsin(0,6))=-80*0,6=-48
<em>log₆(x+1,5)=-log₆x;</em>