Tìm x: 3a^2(x^2 - 1)^4 : 3a^3(x^2 - 1)^3 = 15

tìm x:
3a^2(x^2-1)^4:3a^3(x^2-1)^3=15
x^3(2x-1)^m+2:x^3(2x-1)^m-1-3^5:3^2=0