−7x+2y-7x+2y−7x+2y^2 = −7x+2y-7x+2y−7x+2y−7x+2y-7x+2y−7x+2y Expanding using the FOIL method:= −7x-7x−7x−7x-7x−7x + −7x-7x−7x2y2y2y + 2y2y2y−7x-7x−7x + 2y2y2y2y2y2y = 49x^2 - 14xy - 14xy + 4y^2= 49x^2 - 28xy + 4y^2
Therefore, −7x+2y-7x+2y−7x+2y^2 = 49x^2 - 28xy + 4y^2.
−7x+2y-7x+2y−7x+2y^2 = −7x+2y-7x+2y−7x+2y−7x+2y-7x+2y−7x+2y Expanding using the FOIL method:
= −7x-7x−7x−7x-7x−7x + −7x-7x−7x2y2y2y + 2y2y2y−7x-7x−7x + 2y2y2y2y2y2y = 49x^2 - 14xy - 14xy + 4y^2
= 49x^2 - 28xy + 4y^2
Therefore, −7x+2y-7x+2y−7x+2y^2 = 49x^2 - 28xy + 4y^2.