(X+1)³+b(x+1)²+c(x+1)+d 怎么等于x³+(b+3)x²+(3+2b+c)x+1+b²+c+d的
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![(X+1)³+b(x+1)²+c(x+1)+d 怎么等于x³+(b+3)x²+(3+2b+c)x+1+b²+c+d的](/uploads/image/z/1637475-51-5.jpg?t=%EF%BC%88X%2B1%EF%BC%89%26%23179%3B%2Bb%28x%2B1%29%26%23178%3B%2Bc%28x%2B1%29%2Bd+%E6%80%8E%E4%B9%88%E7%AD%89%E4%BA%8Ex%26%23179%3B%2B%28b%2B3%29x%26%23178%3B%2B%283%2B2b%2Bc%29x%2B1%2Bb%26%23178%3B%2Bc%2Bd%E7%9A%84)
(X+1)³+b(x+1)²+c(x+1)+d 怎么等于x³+(b+3)x²+(3+2b+c)x+1+b²+c+d的
(X+1)³+b(x+1)²+c(x+1)+d 怎么等于x³+(b+3)x²+(3+2b+c)x+1+b²+c+d的
(X+1)³+b(x+1)²+c(x+1)+d 怎么等于x³+(b+3)x²+(3+2b+c)x+1+b²+c+d的
(X+1)³+b(x+1)²+c(x+1)+d
=x³+3x²+3x+1+b(x²+2x+1)+cx+c+d
=x³+3x²+3x+1+bx²+2bx+b+cx+c+d
=x³+(3+b)x²+(3+2b+c)x+1+b+c+d