Resposta :
Resposta:
( a +2b)²
[tex] {a}^{2} + 4ab + 4 {b}^{2} [/tex]
b) ( x + y) ( x - y)
[tex] {x}^{2} - xy + xy - {y}^{2} \\ {x}^{2} - {y}^{2} [/tex]
Resposta:
( a +2b)²
[tex] {a}^{2} + 4ab + 4 {b}^{2} [/tex]
b) ( x + y) ( x - y)
[tex] {x}^{2} - xy + xy - {y}^{2} \\ {x}^{2} - {y}^{2} [/tex]