作业帮6x2-7xy--3y2+14x+y+a=(2x-3y+b)(3x+y+c)则a= b= c =要具体数值!
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6x2-7xy--3y2+14x+y+a=(2x-3y+b)(3x+y+c)则a= b= c =要具体数值!
6x2-7xy--3y2+14x+y+a=(2x-3y+b)(3x+y+c)则a= b= c =
要具体数值!
6x2-7xy--3y2+14x+y+a=(2x-3y+b)(3x+y+c)则a= b= c =要具体数值!
6x2-7xy--3y2+14x+y+a
=(2x-3)(3x+y)+14x+y+a
=(2x-3y+b)(3x+y+c)
=(2x-3)(3x+y)+b(3x+y)+c(2x-3y)+bc
=(2x-3)(3x+y)+(3b+2c)x+(b-3c)y+bc
所以3b+2c=14
b-3c=1
bc=a
所以c=1,b=4,a=4
6x2-7xy--3y2+14x+y+a
=(2x-3)(3x+y)+14x+y+a
=(2x-3y+b)(3x+y+c)
=(2x-3)(3x+y)+(3b+2c)x+(b-3c)y+bc
所以3b+2c=14
b-3c=1
bc=a
a=4,b=4,c=1
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