Tìm x, biết
tìm x, biết :
1, 5x( x - 2000 ) - x + 2000 = 0
2, x^2 -4x = 0
3, ( 1 -x )^2 - 1 + x = 0
4, x + 6x^2 = 0
5, ( x + 1 ) = ( x + 1 )^2
1, 5x( x - 2000 ) - x + 2000 = 0
2, x^2 -4x = 0
3, ( 1 -x )^2 - 1 + x = 0
4, x + 6x^2 = 0
5, ( x + 1 ) = ( x + 1 )^2