С²+27-12с-18с²+12с=-17с²+27
5x^2 - 4x - 1 = 0
D = 16 + 20 = 36
x1 = (4 + 6)/10 = 1
x2 = (4 - 6)/10 = - 1/5 = - 0,2
2x^4-2x^3-11x^2-x-6! x+2
2x^4+4x^3! 2x^3-6x^2+x-3
-6x^3-11x^2
-6x^3-12x^2
x^2-x
x^2+2x
-3x-6
-3x-6
0
<span>x^2 - х в квадрате, остальное аналогично.</span>
B1q-b1=3/4 b1(q-1)=3/4
b1q^3-b1q^2=3/196 b1q^2(q-1)=3/196
(3/196)*(4/3)=q^2
1/49=q^2
q=1/7 q=-1/7
q-1=-6/7 q-1=-8/7
b1=-(3/4)*(7/6)=-7/8 b1=-(3/4)*(8/7)=-6/7
X²=a<span>²</span>
x=±a
1) х²=16
x=±4
2) х²=0
0
3)х²=-4
x=±2i
4)х²=7
x=±√7
5)√х=9
x=81
6)√х=0
x=0
7)√х=-49
Нету решений.
8)3х²-18=0
x=±√6
9)2√х-1=0
x=1/4