Expand the following expression ?

Expand $ (1+x+x^2)^3 $ ?

Expert Solution

Solution:

Let $ x+x^2=y $.

Proceed as follows

Thus, $ (1+x+x^2)^3=x^6+3x^5+6x^4+7x^3+6x^2+3x+1 $.

$ (1+x+x^2)^3 ~is~equal~ to~x^6+3x^5+6x^4+7x^3+6x^2+3x+1 $.

Shams answered 3 years ago

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