решить уравнение;16x^4-40x^2+25-10(4x^2-5)-11=0

16x^4-40x^2+25-10(4x^2-5)-11=016x^4-40x^2+25-40x^2+50-11=016x^4-80x^2+64=0  |:16x^4-5x^2+4=0x^2=tt^2-5t+4=0t1*t2=4t1+t2=5t1=4t2=1x^2=4          x^2=1x1,2=+-2      x3,4=+-1