1.(x+3) (x+5)= 2.(x-7) (x+6)= 3.(a+8) (a-11)= 4.(2a+3) (4a+5)=

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1.(x+3) (x+5)=
2.(x-7) (x+6)=
3.(a+8) (a-11)=
4.(2a+3) (4a+5)=

1. (x+3) (x+5)= x^2+5x+3x+15= x^2+8x+15
2
.(x-7) (x+6)= x^2+6x-7x-42= x^2-x-42
3.(a+8) (a-11)= a^2-11a+8a-88= a^2-3a-88
4.(2a+3) (4a+5)= 8a^2+10a+12a+15= 8a^2+22a+15

gitu?