[tex](2x+7)(-3y+2-4y^2)=\\\\-6xy+4x-8xy^2-21y+14-28y^2=\\\\- 8xy^2 - 6xy + 4x - 28y^2 - 21y + 14[/tex]
Hej!
(2x + 7)(-3y + 2 - 4y²) =
= 6xy + 4x - 8xy² - 21y + 14 - 28y²
Pozdrawiam! - Julka
