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1) 20x²+15x³+10x⁴ = 5x² (4 +3x +2x²)
2) 9ab +18a²b +12ab² = 3ab (3 +6a +4b)
FACTOR COMÚN POR AGRUPACION DE TÉRMINOS
3a²-6ab +4a -8b = (3a²-6ab)+(4a-8b)
= 3a (a-2b) +4 (a -2b)
= (a-2b) (3a +4)
2a² -3ab -4a +6b = (2a² -3ab) - (4a -6b)
= a (2a -3b) -2 (2a -3b)
= (2a -3b) (a -2)