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(x + 6) (x + 1)
x = -6 dan x = -1
c. x^2 -3x =0
(x-3) (x+0)
x = 3 dan x = 0
d. 3x^2 - 12 = 0
1/3 ( 3x +6) (3x-6)
x= -2 dan x = 2
3.c. 2x^2 + 7x +3 =0
1/2(2x + 6) (2x+1)
x = -3 dan x = 1/2
e. 4x^2 + 3x - 1 = 0
1/4(4x + 4) (4x -1)
x = -1 dan x = 1/4
nomor berikutnya soalnya sedikit tidak saya mengerti.. maaf