(3√2-√3)²=(3√2)²-2.3.√2.√3 + (√3)²=18-6√6+3=21-6√6
(16-c)/(√c - 4)=(16-c)(√c+4)/(√c-4)(√c+4)=(16-c)(√c+4)/(c-16)=
=-(√c+4)=-√c-4
(√10-√3)*(√10+√3)=(√10)²-(√3)²=10-3=7
Х²+4X=0
X(X+4)=0
X=0
X+4=0
X=-4
8X²+6X=0
2X(4X+3)=0
2X=0
X=0
4X+3=0
X=-3/4
X=0.75
4x^2+4x+1=0
D=4^2-(4*1*4)=16-17=0
X1=-4/2*4=-4/8=-1/2