1. а) 3x+9-xy-3y = -(x+3)y+3x+9 = (-x-3)(y-3)
1. б) 2x*x+4-2x^4-x^6 = (-x^2 + 2)(x^4-2)
2. Сразу подставим: 2*2*2 - 4*2 - 2^3 - 2*2^2 = 8 - 8 - 8 - 8 = -16
Ответ: -16
3. 42a^3*b^2*c*d + 7a^2*b*c +14d^2 = 7(2d^2 + 6a^3*b^2*c*d + a^2*b*c)
4. 0.226(0.004 - 0.226) + 0.222*0.326 = -0.226*0.222 + 0.222*0.326 = 0.222(-0.226 + 0.326) = 0.222(0.1) = 0.0222