1) 3m³ - 12m⁴ = 3m³ * (1 - 4m)
2) 1/25а² - b⁶ = (1/5a - b³)(1/5a + b³)
<span>3) n</span>²<span> + 20n + 100 = (n + 10)</span>² = (n + 10)(n + 10)
(9/4+15/8)*9/11-7/2=33/8*9/11-7/2=27/8-7/2=27-28/8=-1/8
у= 2ax^3 + 9x^2 + 54ax+ 66
найдем производную
y'=6ax^2+18x+54a
6ax^2+18x+54a<0
ax^2+3x+9a<0
возьмем а=0
3x<0
x<0
D=9-36a=9(1-4a)<=0
1-4a<=0
4a>=1
a>=1/4
0.25 +00