1) y^4-81 = (y^2-9)(y^2+9) = (y+3)(y-3)(y^2+92) (x-2)(2x+6) = x-2=0 => x=2x+6=0 => 2x=-6 => x=-Ответ: x=2, x=-3) x^3-9x=x(x^2-9) = x(x-3)(x+3) = Ответ: x=0, x=3, x=-4) (4a^2 -4a+1) / (4a^2-1) = ((2a-1)(2a-1))/(2a-1)(2a+1) = (2a-1)/(2a+1Ответ: (2a-1)/(2a+1)
1) y^4-81 = (y^2-9)(y^2+9) = (y+3)(y-3)(y^2+9
2) (x-2)(2x+6) =
x-2=0 => x=
2x+6=0 => 2x=-6 => x=-
Ответ: x=2, x=-
3) x^3-9x=
x(x^2-9) =
x(x-3)(x+3) =
Ответ: x=0, x=3, x=-
4) (4a^2 -4a+1) / (4a^2-1) = ((2a-1)(2a-1))/(2a-1)(2a+1) = (2a-1)/(2a+1
Ответ: (2a-1)/(2a+1)