bài tập giải phương trình bậc 2
x 2 - 11x + 30 = 0
x 2 - 10x + 21 = 0
x 2 - 12x + 27 = 0
5x 2 - 17x + 12 = 0
3x 2 - 19x - 22 = 0
x 2 - (1+ 2 )x + 2 = 0
x 2 - 14x + 33 = 0
6x 2 - 13x - 48 = 0
3x 2 + 5x + 61 = 0
x 2 - 3 x - 2 - 6 = 0
x 2 - 24x + 70 = 0
x 2 - 6x - 16 = 0
2x 2 + 3x + 1 = 0
x 2 - 5x + 6 = 0
3x 2 + 2x + 5 = 0
2x 2 + 5x - 3 = 0
x 2 - 7x - 2 = 0
3x 2 - 2 3 x - 2 = 0
-x 2 - 7x - 13 = 0
2 x 2 – 2( )13 x -3 2 = 0
x 2 - 2x - 1 = 0
x 2 - 8x + 15 = 0
2x 2 + 6x + 5 = 0
5x 2 + 2x - 3 = 0
x 2 + 13x + 42 = 0
x 2 - 10x + 2 = 0
x 2 - 7x + 10 = 0
5x 2 + 2x - 7 = 0
4x 2 - 5x + 7 = 0
x 2 - 4x + 21 = 0
5x 2 + 2x -3 = 0
4x 2 + 28x + 49 = 0
x 2 - 6x + 48 = 0
3x 2 - 4x + 2 = 0
x 2 - 16x + 84 = 0
x 2 + 2x - 8 = 0
5x 2 + 8x + 4 = 0
x 2 – 2( )23 x + 4 6 = 0
x 2 - 6x + 8 = 0
3x 2 - 4x + 2 = 0