Others, meanwhile, did FOIL it and came up with an incorrect product, 3x3 + 15x2 - 4x - 20, as a result (instead of 3x3 + 10x2 - 29x - 20). Foiled by the FOIL Method (Opinion) ...

Once you have the right shears, using the foil method is easy. You'll simply roll out about seven to 12 inches of foil and fold the sheet in half about six times, until you have a handful of foil ...