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Use the zero-product property to solve the equation \[ 5 c^{2}-11 c=12 \]

Ask by Lindsey Mathis. in the United States
Feb 27,2025

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Tutor-Verified Answer

Answer

The solutions are \( c = -\frac{4}{5} \) and \( c = 3 \).

Solution

Solve the equation \( 5c^{2}-11c=12 \). Solve the quadratic equation by following steps: - step0: Solve by factoring: \(5c^{2}-11c=12\) - step1: Move the expression to the left side: \(5c^{2}-11c-12=0\) - step2: Factor the expression: \(\left(c-3\right)\left(5c+4\right)=0\) - step3: Separate into possible cases: \(\begin{align}&c-3=0\\&5c+4=0\end{align}\) - step4: Solve the equation: \(\begin{align}&c=3\\&c=-\frac{4}{5}\end{align}\) - step5: Rewrite: \(c_{1}=-\frac{4}{5},c_{2}=3\) The solutions to the equation \(5c^{2}-11c=12\) using the zero-product property are \(c_{1}=-\frac{4}{5}\) and \(c_{2}=3\).

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To solve the equation \( 5c^2 - 11c = 12 \), first, rearrange it to set it to zero: \[ 5c^2 - 11c - 12 = 0. \] Next, we can factor this quadratic equation. We are looking for two numbers that multiply to \( 5 \times (-12) = -60 \) and add to \( -11 \). Those numbers are \( -15 \) and \( 4 \). Now, rewrite the quadratic: \[ 5c^2 - 15c + 4c - 12 = 0. \] Next, group the terms: \[ (5c^2 - 15c) + (4c - 12) = 0, \] \[ 5c(c - 3) + 4(c - 3) = 0. \] Factor out the common term \( (c - 3) \): \[ (5c + 4)(c - 3) = 0. \] Now, apply the zero-product property: 1. Set \( 5c + 4 = 0 \) which gives \( 5c = -4 \) or \( c = -\frac{4}{5}. \) 2. Set \( c - 3 = 0 \) which gives \( c = 3. \) The solutions are: \[ c = -\frac{4}{5} \quad \text{and} \quad c = 3. \]

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