b^2c-9c=c(b^2-9)=c*(b-3)(b+3)
2a^2+12a+18=2(a^2+6a+9)=2(a+3)^2
x-y-2x^2+2y^2=(x-y)-2(x^2-y^2)=(x-y)(1-2(x+y))
2.
3-4(1-6x)=2(3x+4)
3-4+24x=6x+8
18x=9
x=1/2
(x+2)=3(8+4x)
x+2=24+12x
11x=-22
x=-2
1. а) b²c-9c=c(b²-9)=c(b-3)(b+3);
б) 2a²+12a+18=2(a²+6a+9)=2(a+3)²;
в) x-y-2x²+2y²=(x-y)-2(x²-y²)=(x-y)(1-2(x+y))=(x-y)(1-2x-2y).
2. a) 3-4(1-6х)=2(3х+4);
3-4+24х=6х+8;18х=9;
х=0,5.
б) (х+2)/3-4х=8;
х+2=3(8+4х);
х+2=24+12х;
11х=-22;
х=-2.
b^2c-9c=c(b^2-9)=c*(b-3)(b+3)
2a^2+12a+18=2(a^2+6a+9)=2(a+3)^2
x-y-2x^2+2y^2=(x-y)-2(x^2-y^2)=(x-y)(1-2(x+y))
2.
3-4(1-6x)=2(3x+4)
3-4+24x=6x+8
18x=9
x=1/2
(x+2)=3(8+4x)
x+2=24+12x
11x=-22
x=-2
1. а) b²c-9c=c(b²-9)=c(b-3)(b+3);
б) 2a²+12a+18=2(a²+6a+9)=2(a+3)²;
в) x-y-2x²+2y²=(x-y)-2(x²-y²)=(x-y)(1-2(x+y))=(x-y)(1-2x-2y).
2. a) 3-4(1-6х)=2(3х+4);
3-4+24х=6х+8;
18х=9;
х=0,5.
б) (х+2)/3-4х=8;
х+2=3(8+4х);
х+2=24+12х;
11х=-22;
х=-2.