Х+6=5+4х
х-4х=5-6
-3х=-1
х=-1/(-3)
х=1/3
13-3(х+1)=4-5х
13-3х-3=4-5х
-3х+5х=4-13+3
2х=-8
х=-8/2
х=-4
<span>
0,2(3х-5)-0,3(х-14)=-0,7
</span>0.6х-1-0.3х+4.2=-0.7
0.3х=-0.7+1-4.2
0.3х=-3.9
х=-3.9/0.3
х=-13
<span>
-6=-2-(4+9х)</span>
-6=-2-4-9х
-9х=-2-4+6
-9х=0
х=-9
<span>1,2(5-4х)=-6(0,8х+1)
</span>6-4.8х=-4.8х-6
-4.8х+4.8х=-6-6
х=-12
1)х(х-2) х(3х-5)(х-1)
2 2 и -4/3
3 (3,6-2,6)*(3,6+2,6)=6,2
!!!!!!!!!!!!!!!!!!!!!!!!!!
2(p+q)*(p+q)^2
(2p+2q)*(p^2+2pq+q^2)
2p^3+4p^2q+2p^2q+2qp^2+4pq^2+2q^3
Lim x→1 (√x-1)(√x+1)/(√x-1)=limx→1 (√x+1)=2
limx→0 ctg2x/x=limx→0 cos2x/x*sin2x=1/(xsin2x→0)=∞