13x-15= 7x-5
13x-7x=15-5
6x = 10
x=5/3 = 1 2/3
15-(3x-1)=40
15-3x+1=40
-3x=24
x=-8
8x-(2x+4) = 2(3x-2) =
8x-2x-4=6x-4
-4x=0
x=0
( 3x + 4 )^2 - ( x - 5 )^2 = - 9
9x^2 + 24x + 16 - x^2 + 10x - 25 = - 9
8x^2 + 34x - 9 = - 9
8x^2 + 34x = 0
x( 8x + 34 ) = 0
x1 = 0
x2 = - 4,24
<span>а) 6-5х=8-2х,
-5х+2х=8-6,
-3х=2,
x=-2/3
б) 8у+11=у-3</span>,
8y-y=-11-3,
7y=-14,
y=-2
5x²-4x-1=0
D=16+20=36=6²
x=4+6/10=1
x=4-6/10=-1/5=-0.2
Ответ:4x*(x+2)
(m-2n)*(3+n)
(3a-4)*(3a+4)
y*(y+9)^2
(x^2+3)*(x^2-3x+3)*(x^2+3x+3)
x*(x^2-36)=0
x=0
x^2-36=0
x=-6
x=6
Ответ: x=0, x=-6, x=6.
Объяснение: