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Find the number of terms when the expression (1 + x)^10*(1 - x)^10 is expanded completely.

 May 22, 2022
 #1
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Sorry if this is not correct, but I think that there would be 11 terms. Anyone willing to check?

 May 22, 2022
edited by idontknowhowtodivide  May 22, 2022
 #2
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Yes, you're right. It is because (1 + x)^10 (1 - x)^10 is just (1 - x^2)^10.

MaxWong  May 22, 2022

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