1) (2х+1)(4х²-2х-1)
(2х)³+1³
8х³+1
2) -2(х+1)-3(2-3х)=5
-2х-2-6+9х=5
7х-8=5
7х=8+5
7х=13
х=7/13
3) (х-4)(7х+5)=0
х-4=0
7х+5=0
х=4
х= - 5/7
х1= - 5/7,x2=4
4)x²-4=0
x²=4
x=+2
x=-2
x=2
x1=-2,x2=2
5)x³-x²=0
x²×(x-1)=0
x²=0
x-1=0
x=0
x=1
x1=0,x2=1
6)4x²-4×+1=0
(2x-1)²=0
2x-1=0
2x=1
x=1/2
всё ^-^
1) (2х+1)(4х²-2х-1)
(2х)³+1³
8х³+1
2) -2(х+1)-3(2-3х)=5
-2х-2-6+9х=5
7х-8=5
7х=8+5
7х=13
х=7/13
3) (х-4)(7х+5)=0
х-4=0
7х+5=0
х=4
х= - 5/7
х1= - 5/7,x2=4
4)x²-4=0
x²=4
x=+2
x=-2
x=2
x1=-2,x2=2
5)x³-x²=0
x²×(x-1)=0
x²=0
x-1=0
x=0
x=1
x1=0,x2=1
6)4x²-4×+1=0
(2x-1)²=0
2x-1=0
2x=1
x=1/2
всё ^-^