[tex]a) (2x + 6)(x + 4)=2x^{2} +8x+6x+24=2x^{2} +14x+24\\b) (3a + 6)(a + 3)=3a^{2}+9a+6a+18=3a^{2} +15x+18\\c) (2x + 2y)(x + y)=2x^{2} +2xy+2xy+2y^{2} =2x^{2} +4xy+2y^{2} \\d) (4a + b)(7 + b)=28a+4ab+7b+b^{2} \\e) (a +5) (a +5)=a^{2} +5a+5a+25=a^{2} +10a+25\\f) (2m +2)(2m - 3)=4m^{2} -6m+4m-6=4m^{2} -2m-6[/tex]
