-3x>9 ---> x<-3 //////////// (-3)--------------------------------->x
4x<1 ---> x<1/4 ///////////////////////// (1/4) ------------------>x
Пересечение этих множеств будет х Є (-беск, -3)
X²-4=0
x²=4
x=-2
x=2
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5,72*5,72-4,6*0,72-1,12*5,72=5,72(5,72-1,12)-4,6*0,72=5,72*4,6-4,6*0,72=4,6(5,72-0,72)=4,6*5=23
1. (m+3n)(m^2-3mn+9n^2)
2. x(x^2-64y^2) = x(x - 8y)(x+8y)
3. -3(a^2-6a+9) = -3(a - 3)^2
4. 2(ab+5b-a-5) - тут на самом деле не вижу ничего больше
5. (a^2 - 4) (a^2+4)
2 (8a^3 - 1) = -2
3
1. x(x+1) - y(y+1)
2. (2x-y)^2 - 9
3. c^2(ac^2 - c^2 - a +1)
4. 4 - (m - n)^2
4
1. 6x(x^2-4) = 0
x = 0
x = +-2
2. x(25x^2 - 10x + 1) = 0
x = 0
D = 100 - 100 = 0
x = 10/50 = 1/5
3. -
5. Потому что число 4221 заканчивается на 21
6. a - 2ab + b = 5 - 4 = 1
![-3,25\leq\frac{1-4x}{3}<1,25\\\\-3,25*3\leq\frac{1-4x}{3}*3<1,25*3\\\\-9,75\leq1-4x<3,75\\\\-9,75-1\leq1-4x-1<3,75-1\\\\-10,75\leq -4x<2,75|:-4\\\\-0,6875<x\leq2,6875\\\\x\in(-0,6875;2,6875]](https://tex.z-dn.net/?f=-3%2C25%5Cleq%5Cfrac%7B1-4x%7D%7B3%7D%3C1%2C25%5C%5C%5C%5C-3%2C25%2A3%5Cleq%5Cfrac%7B1-4x%7D%7B3%7D%2A3%3C1%2C25%2A3%5C%5C%5C%5C-9%2C75%5Cleq1-4x%3C3%2C75%5C%5C%5C%5C-9%2C75-1%5Cleq1-4x-1%3C3%2C75-1%5C%5C%5C%5C-10%2C75%5Cleq+-4x%3C2%2C75%7C%3A-4%5C%5C%5C%5C-0%2C6875%3Cx%5Cleq2%2C6875%5C%5C%5C%5Cx%5Cin%28-0%2C6875%3B2%2C6875%5D)
Ответ : 3 целых числа : 0 ; 1 ; 2