X-1=0
x=1
x²+4x+2=0
D=16-8=8
x=(-4-2√2)/2=-2-√2
x=-2+√2
_ + _ +
-------------(-2-√2)-----------(-2+√2)--------(1)-------------------
x∈(-∞;-2-√2) U (-2+√2;1)
9а^-6а^3+а^4-а^4+4а^+14а+6а^3=14а^+14а(^-квадрат)
1
3(√7+1)/х(√7-1)(√7+1)=3(√7+1)/(7-1)=3(√7+1)/6=(√7+1)/2
2
(3+√5)(3+√5)/х(3-√5)(3+√5)-3√5/2=(9+6√5+5)/(9-5)-3√√/2=
=(14+6√5)/4-3√5/2=(7+3√5)/2-3√5/2=7/2=3,5