5X( X – 2000) – X + 2000 = 0 B

3. - DE CUONG ON THI TOAN 8 HK1 CO DAP AN
Toán DE CUONG ON THI TOAN 8 HK1 CO DAP AN

3. Tìm x, biết:

a. 5x( x – 2000) – x + 2000 = 0 b. 2 – 25x

2

= 0

c. 2x( x + 3 ) – x – 3 = 0 d. x

2

( x – 3 ) + 12 – 4x = 0