To solve the equation \((v + 5)(3v - 21) = 0\) using the zero product property, we set each factor equal to zero:
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Set the first factor equal to zero: \[ v + 5 = 0 \] Solving for \(v\): \[ v = -5 \]
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Set the second factor equal to zero: \[ 3v - 21 = 0 \] Solving for \(v\): \[ 3v = 21 \] \[ v = \frac{21}{3} = 7 \]
Thus, the solutions to the equation \((v + 5)(3v - 21) = 0\) are: \[ v = -5 \quad \text{and} \quad v = 7 \]