Counting & ProbabilityHardBinomial Theorem, Pascal & Combinatorial Identities ShareBinomial Theorem, Pascal & Combinatorial Identities · Hard problemEvaluate ∑k=08(8k)2\displaystyle\sum_{k=0}^{8}\binom{8}{k}^{2}k=0∑8(k8)2.Check Show answer Walk through it step by step Practice more like this Review this concept