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=3m²-9m-2m²+2m+2m²-2m
=3m²-9m
=3m(m-3)
2. -3d.2d+3d.7+d.5d+d.2+4d
=-6d²+21d+5d²+2d+4d
=-d²+27d
=d(d+27)
2) -6d^+21d + 5d^+2d + 4d = -d^ + 27d