y=sqrt(x-3)(2-x)
y=sqrt(2x+x2-6+3x)
y=sqrt(x2+5x-6)
теперь черти
Решение в приложении.
a>b=c.
(tgt+ctgt)²-(tgt-ctgt)²=tg²t+2tgt*ctgt+ctg²-(tg²t-2tgt*ctgt+ctg²t)=2tgt*ctgt=4*1=4
sin2tcos2t*(tgt+ctgt+2)=1+sin4t
1. tg2t+ctg2t=sin2t/cos2t+cos2t/sin2t=(sin²2t+cos²2t)/(sin2t*cos2t)=1/(sin2t*cos2t)
2. sin2t*cos2t*(1/sin2t*cos2t+2)=sin2t*cos2t*(1+2sin2t*cos2t)/(sin2t*cos2t)=1+sin4t
{8x+3y=31|*5
{6x-5y=45|*3
{40x+15y=155
{18x-15y=135
18x-15y+40x+15y=135+155
58x=290|:58
x=5
8*5+3y=31
3y=31-40
3y=-9|:3
y=-3
Ответ: х=5; у=-3