Question

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Answer 1

x^4+5x^2-14=0  x^2=Z
Z^2+5Z-9=0
D=в^2-4*a*c=5^2-4*  1* (-14)=25+56=81>0
x1=(-5-9)/(2)=(-14)/(2)=-7
x2=(-5+9)/(2)=(4)/(2)=2

Answer 2

x4+5x2-14=0
(x2)2+5x2-14=0
x2=y
y2+5y-14=0
D=5(kvadrat)-4*1*(-14)=25-(-56)=81=9
x1=5+9/2*1=7
x2=5-9/2*1=-2
Жауабы:x1=7 x2=-2

Answer 3

х4+5х2-14=0
x2=a
a2+5a-14=0
D=25+4*14=81
a1,2=-5+-9/2
a1=-7
a2=2