Factorise : 2ab2−aby+2cby−cy2
2ab2−aby+2cby−cy2=2ab2+2cby−aby−cy2=2b(ab+cy)−y(ab+cy)=(ab+cy)(2b−y)
Factorise: abx + aby - bcx - bcy
Factorise: abx+aby−bcx−bcy [2 MARKS]