(-2)^3-1=-9
4*(-2)^5=-128
5*(-2)^2-10+5=15
3*(-2)^2=12
(-9/(-128))/(15/12)=(9*12)/(128*15)=((2^2)*(3^3))/((2^7)*3*5)=
=(2^-5)*(3^2)/(5*7)=9/(32*35)=9/1120=0.00803571428 (примерно)
A²*sin2π +2ab*cos3π/2 +c³*tg2π = a²*0+2ab*0+c³*0=0+0+0=0
a³*ctg270°+b³*tg0° = a³*0+b³*0= 0+0 =0
Смотри.........................
2x^2-10x = 0
2x(x - 5) = 0
1) 2x = 0
x = 0
2) x - 5 = 0
x = 5