6х-12y-3x+3y=0
3x-9y=0
3*10,7-9*7,7=32,1-69,3=-37,2
Arcctg(-11) = <span>- 0.0906598872
</span>arcctg(-4,6) = <span>- 0,214060684
</span>arcctg(143) = <span>24.0397953
</span>arcctg(143), arcctg(-4,6), arcctg(-11)
3(x^2 - 8x + 16) - 3x^2 =
= 3x^2 - 24x + 48 - 3x^2 =
= - 24x + 48
(78-14m^9)² = 78²-2*78*14m^9+(14m^9)² = 6084-2184m^9+196m^18