1- CALCULE : a) (7x+4y) * ( 7x-4y ) =
b) (9+5y)² =
c) (12-2x)² =
d) (14x+2y) * (14x-2y) =
e) (20x+10y)² =
f) (20x-10y)² =
Pf me ajudem , vale nota , obrigado ;)
b) (9+5y)² =
c) (12-2x)² =
d) (14x+2y) * (14x-2y) =
e) (20x+10y)² =
f) (20x-10y)² =
Pf me ajudem , vale nota , obrigado ;)
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