Question

(3x+y)²-(2x+y)²


aiuda D:​

Answer 1

Respuesta:

$R/=5x^{2} +2xy$

Explicación paso a paso:

(3x+y)²-(2x+y)²

(3x+y)² : $9x^{2} +6xy+y^{2}$

$9x^{2} +6xy+y^{2}-(2x+y)^{2}$

$(2x+y)^{2}: 4x^{2} +4xy+y^{2}$

$9x^{2} +6xy+y^{2}-( 4x^{2} +4xy+y^{2})$

$-( 4x^{2} +4xy+y^{2}):-4x^{2} -4xy-y^{2}$

$9x^{2} +6xy+y^{2}-4x^{2} -4xy-y^{2}$

simplificar $9x^{2} +6xy+y^{2}-4x^{2} -4xy-y^{2}: 5x^{2} +2xy$

$R/=5x^{2} +2xy$