1)x(3x+5)-1=x(x-4)3x^2+5х-1=x^2-4x3x^2+5x-1-x^2+4x=0
2x^2+9x-1=0
2)(7x-1)(2+x)=(x-4)
14x+7x^2-2-x=x-413x+7x^2-2-x+4=07x^2+12x+2=0
3) (x+4) (6+x)^2=(x-2)(3-x)
(x+4)(36+12x+x^2)=3x-x^2-6+2x
36x+12x^2+x^3+144+48+4x^2-3x+x^2+6-2x=0
x^3+17x^2+30x+198=0
4)x(8-3x)=(5x-1)^2
8x-3x^2=25x^2-10x+1
8x-3x^2-25x^2+10x-1=0
-28x^2+18x-1=0 умножаем на -1
28x^2-18x+1=0
1)x(3x+5)-1=x(x-4)
3x^2+5х-1=x^2-4x
3x^2+5x-1-x^2+4x=0
2x^2+9x-1=0
2)(7x-1)(2+x)=(x-4)
14x+7x^2-2-x=x-4
13x+7x^2-2-x+4=0
7x^2+12x+2=0
3) (x+4) (6+x)^2=(x-2)(3-x)
(x+4)(36+12x+x^2)=3x-x^2-6+2x
36x+12x^2+x^3+144+48+4x^2-3x+x^2+6-2x=0
x^3+17x^2+30x+198=0
4)x(8-3x)=(5x-1)^2
8x-3x^2=25x^2-10x+1
8x-3x^2-25x^2+10x-1=0
-28x^2+18x-1=0 умножаем на -1
28x^2-18x+1=0