8(3,5-1,5х)=35,5-1,5(7+2х)
28-12х=35,5-10,5-3х
-12х+3х=25-28
-9х=-3
х=1/3
Ответ: 1/3
a³-25a= a(a²-25)= a*(a-5)*(a+5)
1. (-a+2)^2=(2-a)^2= 4-4a+a^2
2. (-b-3)^2=b^2+6b+9
3. (-n+4)^2=(4-n)^2=16-8n+n^2
4. (-x-10)^2= x^2+20x+100
5. (-2x-3y)= 4x^2+12xy+9y^2
6х+4-2х>12
6х-2х>12-4
4х>8
х>2
х5 = х1*q^4
x7 = x1*q^6
x1q^6:x1q^4 = q² = 7² = 49. Вывод: х7 > x5 в 49 раз