Temat:
MatematykaAutor:
fiona60Utworzono:
1 rok temuRoziwązanie w załączniku
Autor:
patchzwbl
Oceń odpowiedź:
16Odpowiedź:
Szczegółowe wyjaśnienie:
1.
[tex]x^4-5x^2+4=0\\x^2=t\\t^2-5t+4=0\\del=b^2-4ac=25-4*1*4=9\\\sqrt{del} =3\\t_1=(5-3)/2=1\\t_2=(5+3)/2=4\\[/tex]
x²=1 x²=4
(x-1)(x+1)=0 (x-2)(x+2)=0
x=1 v x=-1 x=2 v x=-2
2.
[tex]x^4-7x^2+6=0\\x^2=t\\t^2-7t+6=0\\del=49-4*1*6=25\\\sqrt{del} =5\\t_1= 1\\t_2=6[/tex]
x²=1 x²=6
(x-1)(x+1)=0 (x-[tex]\sqrt{6}[/tex])(x+[tex]\sqrt{6}[/tex])=0
x=1 v x=-1 x=[tex]\sqrt{6}[/tex] v x=-[tex]\sqrt{6}[/tex]
3.
[tex]x^4-5x^2+6=0\\x^2=t\\t^2-5t+6=0\\del=25-4*1*6=1\\\sqrt{del} =1\\t_1=2\\t_2=3\\[/tex]
x²=2 x²=3
(x-[tex]\sqrt{2}[/tex])(x+[tex]\sqrt{2}[/tex])=0 (x-[tex]\sqrt{3}[/tex])(x+[tex]\sqrt{3}[/tex])=0
x=[tex]\sqrt{2}[/tex] v x=-[tex]\sqrt{2}[/tex] x=[tex]\sqrt{3}[/tex] v x=-[tex]\sqrt{3}[/tex]
Autor:
lolahsno
Oceń odpowiedź:
8