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simpify \( \frac{4^{y} \cdot 2^{y+2}-8^{y}}{2^{2} \cdot 3^{0} \cdot 2^{3 y}} \)

Ask by Reeves Tyler. in South Africa
Feb 19,2025

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Tutor-Verified Answer

Answer

The simplified form of the expression is \( \frac{3}{4} \) or 0.75.

Solution

Calculate or simplify the expression \( (4^y * 2^(y+2) - 8^y) / (2^2 * 3^0 * 2^(3*y)) \). Simplify the expression by following steps: - step0: Solution: \(\frac{\left(4^{y}\times 2^{y+2}-8^{y}\right)}{\left(2^{2}\times 3^{0}\times 2^{3y}\right)}\) - step1: Evaluate the power: \(\frac{\left(4^{y}\times 2^{y+2}-8^{y}\right)}{\left(2^{2}\times 1\times 2^{3y}\right)}\) - step2: Remove the parentheses: \(\frac{4^{y}\times 2^{y+2}-8^{y}}{2^{2}\times 1\times 2^{3y}}\) - step3: Multiply the terms: \(\frac{2^{3y+2}-8^{y}}{2^{2}\times 1\times 2^{3y}}\) - step4: Multiply the terms: \(\frac{2^{3y+2}-8^{y}}{2^{3y+2}}\) - step5: Subtract the terms: \(\frac{3\times 2^{3y}}{2^{3y+2}}\) - step6: Rewrite the expression: \(3\times 2^{-2}\) - step7: Evaluate the power: \(3\times \frac{1}{4}\) - step8: Multiply: \(\frac{3}{4}\) The simplified form of the expression \( \frac{4^{y} \cdot 2^{y+2}-8^{y}}{2^{2} \cdot 3^{0} \cdot 2^{3 y}} \) is \( \frac{3}{4} \) or 0.75.

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Simplify this solution

Beyond the Answer

Let's simplify the expression step-by-step! First, we notice that \(8^y\) can be rewritten in terms of base 2: \[ 8^y = (2^3)^y = 2^{3y}. \] Now, we rewrite the expression: \[ \frac{4^y \cdot 2^{y+2} - 2^{3y}}{2^2 \cdot 3^0 \cdot 2^{3y}}. \] Next, we can express \(4^y\) in terms of base 2: \[ 4^y = (2^2)^y = 2^{2y}. \] Now substituting for \(4^y\) we get: \[ \frac{2^{2y} \cdot 2^{y+2} - 2^{3y}}{2^2 \cdot 2^{3y}}. \] Combining the powers of 2 in the numerator: \[ 2^{2y} \cdot 2^{y+2} = 2^{2y+y+2} = 2^{3y+2}. \] So the numerator becomes: \[ 2^{3y+2} - 2^{3y}. \] Now, we can factor out \(2^{3y}\) from the numerator: \[ 2^{3y}(2^2 - 1) = 2^{3y}(4 - 1) = 2^{3y} \cdot 3. \] Now, we substitute it back into our expression: \[ \frac{2^{3y} \cdot 3}{2^2 \cdot 2^{3y}}. \] The \(2^{3y}\) terms will cancel out: \[ \frac{3}{2^2} = \frac{3}{4}. \] Thus, the simplified form of the given expression is: \[ \frac{3}{4}. \]

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