1) (x^2+4)^2+(x^2+4)-30=0 2) (x^2-8)^2+3,5(x^2-8)-2=0 3) (1-x^2)^2+3,7(1-x^2)+2,1=0 4) (1+x^2)^2+0,5(1+x^2)-5=0

1)(x^2+4)=aa^2+a-30=0a1+a2=-p=-1a1*a2=q=-30a1=5a2=-6x^2+4=5x^2=5-4=1x1=1x2=-1x^2+4=-6x^2=-6-4=-10-посторонний корень. 2)(x^2-8)=aa^2+3,5a-2=0D=3,5^2-4*1*(-2)=12,25+8=20,25=4,5^2a1=(-3,5+4,5)/2*1=1/2a2=(-3,5-4,5)/2=(-8)x^2-8=a1=1/2x^2=1/2+8=0,5+8=8,5x1=√8,5x2=-√8,5x^2-8=a2=-8x^2=-8+8=0x=03)(1-x^2)=aa^2-3,7a+2,1=0D=(-3,7)^2-4*1*2,1=13,69-8,4=5,69=2,3^2a1=(-(-3,7)+2,3)/2*1=(3,7+2,3)/2=6/2a1=3a2=(-(-3,7)-2,3)/2=(3,7-2,3)/2=1,4/2a2=0,71-x^2=a1=3-x^2=3-1=2x^2=-2-нет корней 1-x^2=a2=0,7-x^2=0,7-1=-0,3x^2=0,3x1=√0,3x2=-√0,34) (1+x^2)=aa^2+0,5a-5=0D=0,5^2-4*1*(-5)=0,25+20=20,25=4,5^2a1=(-0,5+4,5)/2*1=4/2a1=2a2=(-0,5-4,5)/2=(-5)/2a2=-2,51+x^2=a1=2x^2=2-1=1x1=1x2=-11+x^2=a2=-2,5x^2=-2,5-1=-3,5x^2=-3,5-посторонний корень