Tìm X

Tìm X a,3(x-2)^2-(3x-1)(x+2)=15 b,5(1-2x)^2-(10x-1)(x+2)=4 c,8(x-1)^2-(2x-1)^2-(3-2x)^2=13 d,)x+3)^3-x(3x+1)^2+2x+1)(4x^2-20+1)-3x^2=54 mn giúp e vs ạ