Gustavo was asked to solve 64x2+9=13

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

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
x equals negative Start Fraction 3 over 8 End Fraction , x equals Start Fraction 3 over 8 End Fraction

x=−14
, x=14

1 answer

To solve the equation \( 64x^2 + 9 = 13 \) by factoring using the difference of squares pattern, we first move all terms to one side of the equation:

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

This simplifies to:

\[ 64x^2 - 4 = 0 \]

Next, we notice that \( 64x^2 - 4 \) is a difference of squares, which can be factored as follows:

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

Setting each factor equal to zero gives us:

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

Solving the first equation:

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

Solving the second equation:

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

Hence, the solutions are:

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

Among the provided responses, the one that correctly indicates the solutions is:

x = -Start Fraction 1 over 4 End Fraction, x = Start Fraction 1 over 4 End Fraction.