1) 68m−221n−13yn+4ym = 17(4m-13n) = (17+y)(4m-13n)
2) c(3c+10)−18(−10−3c) = c(3c+10)+18(3c+10) = (c+18)(3c+10)
3) 54+24c^3+20c^4+45c = 6(9+4с^3)+5с(4с^3+9) = (9+4с^3)(6+5с)
4) −12a^2c^2+4ac^3+16a^2c = -4ac(3ac - c^2 - 4a)
5) xz−112d−7z+16xd = z(x-7)+16d(x-7) = (z+16d)(x-7)
6) 2xy−9xb+32y−144b = x(2y-9b)+16(2y-9b) = (x+16)(2y-9b)
7) 18ab+18bc = 18b(a+c)
8) 40b3x^2−130b2x^3+10b^4x = 10bx(4•3x-13•2x^2+b^3) = 10bx(12x-26x^2+b^3)
Хкг 20%
10-хкг-30%
20*х+30*(10-х)=10*27
20х+300-30х=270
10х=300-270
10х=30
х=30:10
х=3кг 20%
10-3=7кг 30%
<span>4^sin(x)+2^(5-2sin(x))=18 </span>
<span>4^sin(x)+2^5/2^2sin(x)=18 </span>
<span>t+2^5/t=18 </span>
<span>t^2-18t+32=0 </span>
<span>t1=2 t2=16 </span>
<span>4^sin(x)=2 x=(-1)^k*п/6+пк к Є Z </span>
<span>4^sin(x)=4^2 </span>
<span>Sin(x)=2 </span>
<span>Ответ: x=(-1)^k*п/6+пк к Є Z</span>
<span>!</span>
<span>
</span>
(4a+3)(4a-3)
25x(x^2-3)
2(x+y)^2
643*643= 413449 413449-294849=<span>118600
</span>
543*543=<span>294849
</span>