(5-2)二次方,等于几

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(5-2)二次方,等于几(5-2)二次方,等于几(5-2)二次方,等于几(5-2)^2=3^2=9永远是=(3)^2=9(5-2)²原式=(5-2)(5-2)=5*(5-2)-2*(5-2)

(5-2)二次方,等于几
(5-2)二次方,等于几

(5-2)二次方,等于几
(5-2)^2=3^2=9

永远是=(3)^2
=9

(5-2)²
原式=(5-2)(5-2)
=5 * (5-2)-2 * (5-2)
=25-10-10+4
=9