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B. x^2 + 6x - 7x - 42
x^2 - x - 42
C. 6x^2 - 9x + 12x - 18
6x^2 + 3x - 18
D. 2x^2 + 12x - 7x - 42
2x^2 + 5x - 42
8x^2-6x^2y+14xy=
b.(x-7)(x+6)=
x^2+6x-7x-42
x^2 - x - 42
c.(3x+6)(2x-3)=
6x^2-9x+12x-18=
6x^2- 21x -18
d.(2x-7)(x+6)=
2x^2+12x-7x-42=
2x^2+ 5x -42
^=pangkat
maaf jika salah