Category:Pascal's triangle: Difference between revisions

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${\displaystyle \begin{array}{cc}(a+b{)}^0=& 1\\ (a+b{)}^1=& 1a+1b\\ (a+b{)}^2=& 1a^2+2ab+1b^2\\ (a+b{)}^3=& 1a^3+3a^{2}b+3a{b}^2+1b^3\\ (a+b{)}^4=& 1a^4+4a^{3}b+6a^2{b}^2+4a{b}^3+1b^4\end{array}}$