Question

X3+3x2+3x+1 is divisible by x+1

Answer 1

let x+1 = 0

then x = -1

let's substitute 'x' in the equation

x3+3x2+3x+1 = 3(-1)+3(-1)2+3(-1)+1

                      = -3+3-3+1

                      = -2

since the answer is not equals to 0

therefore, x+1 doesnot divide x3+3x2+3x+1

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