Tìm x: 5*( 4x - 1 ) + 2*( 1 - 3x ) - 6*( x + 5 ) = 10, 2x*( x + 1 ) + 3*( x - 1 )*( x + 1 ) - 5x*( x + 1 ) + 6x mũ 2 = 0

a, 5*(4x-1)+2*(1-3x)-6*(x+5)=10
b, 2x*(x+1)+3*(x-1)*(x+1)-5x*(x+1)+6x mũ 2 = 0
c, 4*(x-1)*(x+5)-(x+2)*(x+5)-3(x-1)*(x+2)=0
d,2*(5x-8)-3*(4x-5)=4*(3x-4)+11