1.
1) .......=7m^4 - 56m³+63m
2) ........=2x² - - x - 3
3) ..........=15m² +4mn - 32n²
4) ..........=y³+y² -6y+3y²+3y-18=y³+4y² - 3y - 18
2.
1) ..........=6b(2a-3b)
2) ........=7x^4*(3x³ -1)
3) ........=8(x-y)+a(x-y)=(8+a)(x-y)
3.
5x² - 15x=0
5x(x-3)=0
x(x-3)=0
x1=0
x-3=0
x2=3
4.
...............=6c² -14c - c² - 3c +4=5c² - 17c + 4
5.
1) ................
2(4x-1)-3(x+2)=2*18
8x - 2 - 3x - 6=36
5x=36+8
5x=44
x=8.8
2) ..............
6x² +11x -35=6x² -7x -3+4x
11x+3x=32
14x=32
x=32/14
x=16/7=2 2/7
6.
..............=7x(2y+1)-(2y+1)=(7x-1)(2y+1)
при х=1 1/7, у= -0,6
(7 *8/7 - 1)(2*(-0,6)+1)=7 * (-0,2)= - 1,4
7,
81^5 - 27^6=(3^4)^5 - (3³)^6=3^(20) - 3^(18)=3^(18)*(3² - 1)=3^(18) * 8
выражение кратно 8
8,
х² -12х+20=