Respuesta: a)
( 2y + 1) x (2+y-3x1)
(2y+1)x(3+y-3x)
6y+2y²-6xy + 3+ y - 3x
7y+2y² - 6xy+3-3x
B)
(2xy-3) x (5x+3y+4)
2xyx(5x+3y+4)-3(5x+3y+4)
10x²y+6xy²+8xy - 3 ((5x+3y+4)
10x²y+6xy²+8xy -15x-9y-12
c) (2x-3) x (x-y-4)
2xx (x-y-4) -3 (x-y-4)
2x² - 2xy - 8x-3 (x-y-4)
2x² - 2xy - 8x-3 x +3 y+ 12
2x²- 2xy-11x + 3y + 12
de nada espero que te sirva
