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Use the Binomial Theorem to expand each binomial and express the result in simplified form. $$(2 x+1)^{4}$$

Short Answer

Expert verified
The simplified form of the binomial expression \((2x+1)^4\) is \(16x^4 + 32x^3 + 24x^2 + 8x + 1\).

Step by step solution

01

Using the Binomial Theorem

Start by writing the expression where Binomial Theorem can be applied. Here, Binomial Theorem states that \((a+b)^n=\sum_{k=0}^{n}\) \(n\choose k\) \(a^{n-k} b^{k}\) where \(n\choose k\) is the binomial coefficient. So \((2x+1)^4=\sum_{k=0}^{4}\) \(4\choose k\) \((2x)^{4-k} 1^{k}\)
02

Expanding Through the Binomial Coefficients

We then apply the binomial coefficients (binoms) from \(k=0\) to \(k=4\). These are calculated as \(4\choose 0\), \(4\choose 1\), \(4\choose 2\), \(4\choose 3\), and \(4\choose 4\) respectively. Therefore, the expanded form is \(4\choose 0\) \((2x)^4\cdot 1^0\) + \(4\choose 1\)\((2x)^3\cdot 1^1\) + \(4\choose 2\)\((2x)^2\cdot 1^2\) + \(4\choose 3\)\((2x)^1\cdot 1^3\) + \(4\choose 4\)\((2x)^0\cdot 1^4\)
03

Simplifying the Expression

Now simplify the expression by calculating each term. This will give \(1\cdot16x^4\) + \(4\cdot8x^3\) + \(6\cdot4x^2\) + \(4\cdot2x\) + \(1\cdot1\). After simplifying, it yields \(16x^4 + 32x^3 + 24x^2 + 8x + 1\).

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