Solve the following quadratic equation for all values of xx in simplest form.

4, left parenthesis, 5, x, minus, 10, right parenthesis, squared, minus, 34, equals, minus, 33
4(5x−10)
2
−34=
−33

1 answer

To solve the equation

\[ 4(5x - 10)^2 - 34 = -33, \]

let's start by isolating the quadratic term. We can add 34 to both sides:

\[ 4(5x - 10)^2 - 34 + 34 = -33 + 34, \]

which simplifies to

\[ 4(5x - 10)^2 = 1. \]

Next, we divide both sides by 4:

\[ (5x - 10)^2 = \frac{1}{4}. \]

Now, we take the square root of both sides. Remember to consider both the positive and negative roots:

\[ 5x - 10 = \frac{1}{2} \quad \text{or} \quad 5x - 10 = -\frac{1}{2}. \]

Case 1:

\[ 5x - 10 = \frac{1}{2} \]

Adding 10 to both sides gives:

\[ 5x = \frac{1}{2} + 10. \]

Converting 10 to a fraction:

\[ 10 = \frac{20}{2} \Rightarrow 5x = \frac{1}{2} + \frac{20}{2} = \frac{21}{2}. \]

Now, divide both sides by 5:

\[ x = \frac{21/2}{5} = \frac{21}{10}. \]

Case 2:

\[ 5x - 10 = -\frac{1}{2}. \]

Adding 10 to both sides gives:

\[ 5x = -\frac{1}{2} + 10. \]

Converting 10 to a fraction:

\[ 10 = \frac{20}{2} \Rightarrow 5x = -\frac{1}{2} + \frac{20}{2} = \frac{19}{2}. \]

Now divide both sides by 5:

\[ x = \frac{19/2}{5} = \frac{19}{10}. \]

Thus, the solutions for the quadratic equation are:

\[ x = \frac{21}{10} \quad \text{and} \quad x = \frac{19}{10}. \]