Question

resposta de (2a+3)(2a-3)

Answer 1

Em geral, $(x+y)(x-y)=x^2-xy+xy-y^2=x^2-y^2$.

Assim,

$(2a+3)(2a-3)=(2a)^2-3^2=4a^2-9$

Answer 2

4a²-6a+6a-9
logo,
4a²-9