bonsoir
A=
x² -5x -6-2x
= x² -7x -6
B=
6x² -12x -2x +3x²
= 9x² -14x
c=
-3x² -21 +6x -1 -15x -7x² -3
= -10x² -9x -25
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Verified answer
bonsoir
A=
x² -5x -6-2x
= x² -7x -6
B=
6x² -12x -2x +3x²
= 9x² -14x
c=
-3x² -21 +6x -1 -15x -7x² -3
= -10x² -9x -25
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