Respuesta:
(3x+9) (2x-5)=
6x²-15x+18x-45
6x²+3x-45
(4x+2y) (5x-10y)=
20x²-40xy+10xy-20y²
20x²-30xy-20y²
(5a+8) (5a+8)=
25a²+40a+40a+64
25a²+80a+64
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Verified answer
Respuesta:
(3x+9) (2x-5)=
6x²-15x+18x-45
6x²+3x-45
(4x+2y) (5x-10y)=
20x²-40xy+10xy-20y²
20x²-30xy-20y²
(5a+8) (5a+8)=
25a²+40a+40a+64
25a²+80a+64