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

 Jan 7, 2022
 #1
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\((1 + x)^{10}*(1 - x)^{10}\\ =[(1 + x)(1 - x)]^{10}\\ =[1-x^2]^{10} \)

 

This will have 11 terms

 

\(1-10x^2+ ..... -10x^{18}+x^{20}\)

 Jan 8, 2022

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