решите уравнение . 2x^4-52x^2+50=0

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