Solve the following quadratic equation using square roots: (−9+(x−3)2)/−4=−4

.(1 point)

1 answer

To solve the equation \(\frac{-9 + (x - 3)^2}{-4} = -4\), we first eliminate the fraction by multiplying both sides by \(-4\):

\[ -9 + (x - 3)^2 = 16 \]

Next, we isolate \((x - 3)^2\) by adding \(9\) to both sides of the equation:

\[ (x - 3)^2 = 16 + 9 \] \[ (x - 3)^2 = 25 \]

Now, we can solve for \(x - 3\) by taking the square root of both sides. Remember to consider both the positive and negative roots:

\[ x - 3 = \pm 5 \]

This gives us two cases to consider:

  1. \(x - 3 = 5\)
  2. \(x - 3 = -5\)

Now we solve each case:

  1. For \(x - 3 = 5\): \[ x = 5 + 3 = 8 \]

  2. For \(x - 3 = -5\): \[ x = -5 + 3 = -2 \]

Thus, the solutions to the quadratic equation are:

\[ x = 8 \quad \text{and} \quad x = -2 \]