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OpenStudy (anonymous):
Identify the binomial expansion (2x-y)^4
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OpenStudy (saifoo.khan):
+10
OpenStudy (anonymous):
Thats not an answer.
OpenStudy (anonymous):
(a+b)^4 = a^4 + 4a^3b + 6a^2b^2+... where the coefficients follow Pascal triangle. Substitute a = 2x abd b = -y for your answer.
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