(m+4)(4m-2)=5(m+3)-10

3 min read Jun 16, 2024
(m+4)(4m-2)=5(m+3)-10

Solving the Equation (m+4)(4m-2) = 5(m+3) - 10

This article will guide you through the process of solving the equation (m+4)(4m-2) = 5(m+3) - 10.

Step 1: Expand the equation

First, we need to expand both sides of the equation by using the distributive property:

  • Left side: (m+4)(4m-2) = 4m² - 2m + 16m - 8 = 4m² + 14m - 8
  • Right side: 5(m+3) - 10 = 5m + 15 - 10 = 5m + 5

Now our equation looks like this: 4m² + 14m - 8 = 5m + 5

Step 2: Move all terms to one side

To solve for m, we need to have all the terms on one side of the equation. Let's subtract 5m and 5 from both sides:

4m² + 14m - 8 - 5m - 5 = 0

This simplifies to: 4m² + 9m - 13 = 0

Step 3: Solve the quadratic equation

Now we have a quadratic equation. There are a few ways to solve it:

  • Factoring: Try to factor the quadratic expression. However, in this case, factoring might not be straightforward.

  • Quadratic Formula: The quadratic formula is a reliable method to find the solutions of any quadratic equation. The formula is:

    m = (-b ± √(b² - 4ac)) / 2a

    Where a, b, and c are the coefficients of the quadratic equation (ax² + bx + c = 0).

    In our equation, a = 4, b = 9, and c = -13. Substitute these values into the quadratic formula and solve for m.

  • Completing the Square: This method involves manipulating the equation to create a perfect square trinomial. However, it's usually less efficient than the quadratic formula for this particular equation.

Step 4: Find the solutions

After applying the quadratic formula (or your preferred method), you'll get two solutions for m. These solutions represent the values of m that make the original equation true.

Conclusion

By following these steps, you can solve the equation (m+4)(4m-2) = 5(m+3) - 10 and find the values of m that satisfy the equation. Remember to double-check your solutions by plugging them back into the original equation.

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