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Tria l'opció correcte Factor comú 1 4a(a + 2) 2a2 + 4a 2a(a + 2) 2a2(a + 2) 2 x2(x - 1) x2 - x 2x(x - 1) x(x - 1) 3 3x(x - 5) 3x2 - 15x 3x(x - 1) 3x2(x - 5) 4 5(x - 3) 5x - 15 5(x - 1) 5x(x - 1) 5 5x2(6x2 + 5x - 2) 30x3 + 25x2 - 10x 5x(6x2 + 5x - 2) 5x(6x2+ 5x - 1) 6 n5(25n - 10n2) n5 + 25n4 - 10n3 5n3(n2 + 5n - 2) n3(n2 + 25n - 10) 7 2x(x2 - 3) 2x3 - 6x 6x(x2 - 1) 2x2(x - 3) 8 5x(1 + y) 5x+5y 5xy(x + 1) 5(x + y) 9 (15x+3)(2x-1) 5x(2x-1)+3(2x-1) (5x+3)(2x-1) (3x+5)(2x-1) 10 (x-1)(y+2) x(y+2)-y-2 (x+1)(y-2) (x+2)(y-1) |