Find the coefficient of x5 in the binomial expansion of (x + 3)^8.
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(x + 3)^8
x^8 +3^ 8
x^8+6561
take in standard form
x^8+0x^7+0x^6+0x^5+0x^4+0x^3+0x^2+0x+6561
x^5=0
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