Ответ:
Пошаговое объяснение:
3*600*(1-0,1)*(1-0,2)=1296
за 6 минут.
18/5~4
2*4=8
18+8=26
26/5=5,2 (округляем до шести)
408
196
---------
2448
3672
408
------------
79968
2a-ab=a(2a-b)
.
7am-7bm=7m(a-b)
.
![{a}^{5} + {a}^{3} + 2 {a}^{2} + 2 = {a}^{3} ( {a}^{2} + 1) + 2( {a}^{2} + 1) = ( {a}^{3} + 2)( {a}^{2} + 1)](https://tex.z-dn.net/?f=+%7Ba%7D%5E%7B5%7D++%2B++%7Ba%7D%5E%7B3%7D++%2B+2+%7Ba%7D%5E%7B2%7D++%2B+2+%3D++%7Ba%7D%5E%7B3%7D+%28+%7Ba%7D%5E%7B2%7D++%2B+1%29+%2B+2%28+%7Ba%7D%5E%7B2%7D++%2B+1%29+%3D+%28+%7Ba%7D%5E%7B3%7D++%2B+2%29%28+%7Ba%7D%5E%7B2%7D++%2B+1%29)
.
x-4y+x²-16y²=(x-4y)+(x-4y)(x+4y)=(x-4y)(1+x+4y)