分解因式:x的平方+3xy+2y的平方+5x+7y+6
2013-04-16
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你好!!! x^2+3xy+y^2+5x+7y+6
=x�0�5+(3y+5)x+(y�0�5+5y+6)
=x�0�5+(3y+5)x+(y+2)(2y+3)
=x�0�5+[(y+2)+(2y+3)]x+(y+2)(2y+3)
=(x+(y+2))(x+(2y+3))
=(x+y+2)(x+2y+3); 祝你学业进步!!
=x�0�5+(3y+5)x+(y�0�5+5y+6)
=x�0�5+(3y+5)x+(y+2)(2y+3)
=x�0�5+[(y+2)+(2y+3)]x+(y+2)(2y+3)
=(x+(y+2))(x+(2y+3))
=(x+y+2)(x+2y+3); 祝你学业进步!!
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