b. 4x² + 4x + 1 = 0
Jawaban:
4x² + 4x + 1 = 0
(2x + 1 ) (2x + 1)
Maka akrnya adalah x = -1/2
c. -3x - 5x +2 = 0
Jawaban:
-3x - 5x +2 = 0
-8x +2 = 0
-8x = -2
x = 1/4
d. 2x² - x - 3 = 0
Jawaban:
2x² - x - 3 = 0
(2x - 3)( x +1) = 0
x = 3/2 dan x = -1