Решите уравнение . 2x^4-52x^2+50=0
2x^4-52x^2+50=0 /2 x^4-26x^2+25=0 x^2=t t^2-26t+25=0 D=b^2-4ac= 26^2-4*25*1=676-100=576 X1=(26-24)/2=1 X2=(26+24)/2=25 t=1 t=25 x^2=1 x^2=25 x= +1 и -1 x= +5 и -5