HELP PLS CPHIL MELODY ANYONE!!

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For non-negative integers a and b, where a and b are both greater than or equal to 2, simplify the following:

$\binom{a + b}{2} - \binom{a}{2} - \binom{b}{2}.$

Guest Mar 3, 2023

Guest · Answer 1 · 2023-03-03T03:09:18

$\binom{a + b}{2} - \binom{a}{2} - \binom{b}{2} = a + b + 1$

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