Log(a)b=log(c)b/log(c)a
log(a^n)(b^n)=log(a)b
nlog(a)b=log(a)b^n
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a)
log(6)4+log(6)9+1/log(6)4 *2log(6)2 +2=log(6)(4*9)+log(6)4/log(6)4+2=
=log(6)36+1+2=2+3=5
б)
log(2)10+log(2)12-log(2)30 +4=log(2)(10*12/30)+4=log(2)4+4=2+4=6
в)
log(2)6+log(2)10-log(2)15+2^log(2)5=log(2)(6*10/15)+5=log(2)4+5=2+5=7
(-2x+5)(-4x-9)
-2x+5-4x-9=0
-2x-4x=9-4
-6x=5
x=-5/6
<span><span>-17+с+47 = 30 +с
-16+р+(-21) = -16 + p - 21 = p - 37
8в+12в-21в+в = 0
1,2с+1-0,6у-0,8-0,2с = с - 0,6у + 0,2
(2-4в)-(31в-6)-11</span> = 2 - 4в - 31в + 6 - 11 = -35в - 3</span>
(8x+6)-(7x+4)=5
8x+6-7x-4=5
8x-7x=5-6+4
x=3
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