Solve Complex Fraction Equation: (x²-64)/(x-8) = 17(x+8)/(64-x²)

Question

x264x8=17(x+8)64x2 \frac{x^2-64}{x-8}=\frac{17(x+8)}{64-x^2}

Video Solution

Solution Steps

00:00 Solve
00:03 Convert from 64 to 8 squared
00:20 Use the shortened multiplication formulas
00:56 Reduce what we can
01:14 Multiply to eliminate the fraction
01:34 Open parentheses properly
01:48 Arrange the equation so that the right side equals 0
02:09 Again use the shortened multiplication formulas
02:16 Find the two possible solutions
02:43 And this is the solution to the question

Step-by-Step Solution

To solve this problem, follow these steps:

  • Step 1: Factorize the terms involving squares. Notice that x264=(x8)(x+8)x^2 - 64 = (x-8)(x+8) and 64x2=(8x)(8+x)64 - x^2 = (8-x)(8+x).
  • Step 2: Rewrite both sides of the equation using these factorizations:

(x8)(x+8)x8=17(x+8)(8x)(8+x) \frac{(x-8)(x+8)}{x-8} = \frac{17(x+8)}{(8-x)(8+x)}

Upon simplifying, the left side becomes x+8x+8 because the (x8)(x-8) term cancels out, as long as x8x \neq 8.

x+8=17(x+8)(x8)(x+8) x + 8 = \frac{17(x+8)}{-(x-8)(x+8)}

  • Step 3: Cancel (x+8)(x+8) from both numerator and denominator on the right side (assuming x8x \neq -8).
  • Step 4: This simplifies to:

x+8=17x8 x + 8 = \frac{-17}{x-8}

  • Step 5: Multiply both sides by (x8)(x-8) to eliminate the denominator:

(x+8)(x8)=17 (x+8)(x-8) = -17

x264=17 x^2 - 64 = -17

  • Step 6: Rearrange and solve for xx:

x2=47 x^2 = 47

x=±47 x = \pm \sqrt{47}

Therefore, the solution to the problem is x=±47 x = \pm \sqrt{47} .

Answer

±47 ±\sqrt{47}