Задание
<span>Решить уравнения
1) 5х +1=3х +19
2) х -1=7х -7
3) х- 2=1+4х
4) 5(х-4)=х+8
5) 5-(4+3х)=5(х+1)
6) (7х+9)-(11х-7)=8
Решение
</span><span>1) 5х +1=3х +19
</span>5x-3x=19-1
2x=18
x=18/2
x=9
2)<span> х -1=7х -7
7x-x=-1+7
6x=6
x=6/6
x=1
</span><span>3) х- 2=1+4х
4x-x=-2-1
3x=-3
x=-3/3
x=-1
</span><span>4) 5(х-4)=х+8
5x-20=x+8
5x-x=8+20
4x=28
x=28/4
x=7
</span><span>5) 5-(4+3х)=5(х+1)
5-4-3x=5x+5
5x+3x=5-4-5
8x=-4
X=-4/8
x=-1/2
</span><span>6) (7х+9)-(11х-7)=8
7x+9-11x+7=8
-4x=8-7-9
-4x=-8
4x=8
x=8/4
x=2</span>
1) 6x^2-2x+5+10x-5x^2=x^2+3x+5
2) 6xy+8y-2xy-8y+1=4xy+1
=25^(5/4+(-5/12)-1/3)=25^(15/12 - 5/12 - 4/12) = 25^(6/12) = 25^(1/2) = √25 = 5
(2х)³+3*(2x)²+3*2x+1³=0 формула кубов
(2х+1)³=0
2х+1=0
2х=-1
х=-1/2
х=-0,5