当x-3y=0时,求(x二次方+xy+2y二次方)÷(x二次方-xy+y二次方)的值
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当x-3y=0时,求(x二次方+xy+2y二次方)÷(x二次方-xy+y二次方)的值当x-3y=0时,求(x二次方+xy+2y二次方)÷(x二次方-xy+y二次方)的值当x-3y=0时,求(x二次方+
当x-3y=0时,求(x二次方+xy+2y二次方)÷(x二次方-xy+y二次方)的值
当x-3y=0时,求(x二次方+xy+2y二次方)÷(x二次方-xy+y二次方)的值
当x-3y=0时,求(x二次方+xy+2y二次方)÷(x二次方-xy+y二次方)的值
∵x-3y=0
∴x=3y
∴(x²+xy+2y²)÷(x²-xy+y²)
=[(3y)²+(3y)y+2y²]÷[(3y)²-(3y)y+y²]
=(9y²+3y²+y²)÷(9y²-3y²+y²)
=13y²÷7y²
=13÷7
=7分之13
=1又7分之6