По теореме Виета
x1+х2= -р = 5+√3+5-√3=10, -p=10, p=-10
х1*х2=q =(5+√3)(5-√3)=5²-(√3)²=25-3=22, q=22
x²-10x+22=0
1+sin2a/(sina+cosa)=(sina+cosa)^2/(sina+cosa)=sina+cosa
1)D=4+4=8
x1=(2-2√2)/2=1-√2
x2=1+√2
2)D=64+16=80
x1=(8-4√10)/8=1-0,5√10
x2=1+0,5√10
3)D=4+16=20
x1=(2-2√5)/2=1-√5
x2=1+√5