1
3a²-1/4*ax-4a+5a³x
2
-6a^4b²+8a³b^5
3
5a²b³(3b^4-4a)
4
(x-y)(6ab^5+15a³b²)=3ab²(x-y)(2b³+5a²)
5
27x³y³-9x^4y-3xy³+9x5+9x^4y=27x³y³-3xy³+9x^5
<span>х(x+2)-(x+3)(x+1)=2x+3,
х</span>²+2х-(х²+х+3х+3)=2х+3,
х²+2х-(х²+4х+3)=2х+3,
х²-х²-4х-3х=3,
-4х-3=3,
-4х=3+3,
-4х=6,
х=6:(-4),
х=-1,5.
Ответ: -1,5.
5х-2(7+5х)=-4х-10
5х-14-10х+4х+10=0
9х-10х-4=0
D= (-10)²-4*9*(-4)= 100+144= 244
D>0, 2 корня
х1= -(-10)+√244/2*9= 10+2√61/18= 2*(5+√61)/18= (5+√61)/9
х2= (5-√61)/9
(х-3)(х+3) \ 4( х-3) = (х+3) \ 4
18-3x-4-2x=10
14-5x=10
-5x=10-14
-5x=-4
<span>x=0,8</span>