Gustavo was asked to solve 64x^2+9=13

by factoring using the difference of squares pattern. What is/are the correct solution(s)?(1 point)
Responses

x=−14
, x=14
x equals negative Start Fraction 1 over 4 End Fraction , x equals Start Fraction 1 over 4 End Fraction

x=38
x equals Start Fraction 3 over 8 End Fraction

x=−14
x equals negative Start Fraction 1 over 4 End Fraction

x=−38
, x=38

1 answer

To solve the equation \( 64x^2 + 9 = 13 \) by factoring using the difference of squares pattern, we first rearrange the equation:

\[ 64x^2 + 9 - 13 = 0 \implies 64x^2 - 4 = 0 \]

Next, we can factor this equation. Notice that \( 64x^2 \) and \( 4 \) can be expressed as perfect squares:

\[ (8x)^2 - 2^2 = 0 \]

This is now a difference of squares, which can be factored as:

\[ (8x - 2)(8x + 2) = 0 \]

Setting each factor equal to zero gives us:

  1. \( 8x - 2 = 0 \)
  2. \( 8x + 2 = 0 \)

For the first equation:

\[ 8x - 2 = 0 \implies 8x = 2 \implies x = \frac{2}{8} = \frac{1}{4} \]

For the second equation:

\[ 8x + 2 = 0 \implies 8x = -2 \implies x = \frac{-2}{8} = -\frac{1}{4} \]

So the solutions to the equation \( 64x^2 + 9 = 13 \) are:

\[ x = \frac{1}{4}, \quad x = -\frac{1}{4} \]

The correct solutions among the given options are:

x equals negative Start Fraction 1 over 4 End Fraction, x equals Start Fraction 1 over 4 End Fraction.