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Solve \( 5 t^{2}+13 t+6=0 \) by factoring. Enter your answers as a list separated by a comma \( t= \)

Ask by Davies Nichols. in the United States
Feb 03,2025

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Answer

\( t = -2, -\frac{3}{5} \)

Solution

To solve the quadratic equation \( 5t^{2} + 13t + 6 = 0 \) by factoring, follow these steps: 1. **Multiply the coefficient of \( t^2 \) (which is 5) by the constant term (which is 6):** \[ 5 \times 6 = 30 \] 2. **Find two numbers that multiply to 30 and add up to 13:** \[ 3 \times 10 = 30 \quad \text{and} \quad 3 + 10 = 13 \] 3. **Rewrite the middle term using these two numbers:** \[ 5t^{2} + 3t + 10t + 6 = 0 \] 4. **Factor by grouping:** \[ t(5t + 3) + 2(5t + 3) = 0 \] 5. **Factor out the common term \( (5t + 3) \):** \[ (t + 2)(5t + 3) = 0 \] 6. **Set each factor equal to zero and solve for \( t \):** \[ t + 2 = 0 \quad \Rightarrow \quad t = -2 \] \[ 5t + 3 = 0 \quad \Rightarrow \quad t = -\frac{3}{5} \] **Final Answer:** \[ t= -2, -\frac{3}{5} \]

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To solve the equation \( 5t^{2} + 13t + 6 = 0 \) by factoring, we look for two numbers that multiply to \( 5 \times 6 = 30 \) and add to \( 13 \). The numbers \( 3 \) and \( 10 \) fit this requirement. Next, we can rewrite the equation by splitting the middle term: \[ 5t^{2} + 3t + 10t + 6 = 0 \] Now group the terms: \[ (5t^{2} + 3t) + (10t + 6) = 0 \] Factor out the common factors: \[ t(5t + 3) + 2(5t + 3) = 0 \] Now, factor by grouping: \[ (5t + 3)(t + 2) = 0 \] Setting each factor equal to zero gives us the solutions: 1. \( 5t + 3 = 0 \) → \( 5t = -3 \) → \( t = -\frac{3}{5} \) 2. \( t + 2 = 0 \) → \( t = -2 \) Therefore, the final answers are: \( t = -\frac{3}{5}, -2 \)

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