Cw. 1
[tex]a)\\(x+4)(x+3)=x^2+3x+4x+12=x^2+7x+12\\\\b)\\(p+6)(p-q)=p^2-pq+6p-6q\\\\c)\\(p+q)(q-2p)=pq-2p^2+q^2-2pq=-2p^2+q^2-pq[/tex]
[tex]d)\\(3x+1)(2x+6)=6x^2+18x+2x+6=6x^2+20x+6\\\\e)\\(a+3b)(3a-2b)=3a^2-2ab+9ab-6b^2=3a^2-7ab-6b^2\\\\f)\\(2a-\frac12b)(4a-3b)=8a^2-6ab-2ab-\frac32b^2=8a^2-8ab-\frac32b^2[/tex]
