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Perform the following operation and express in simplest form.

(x^(4)-6x^(3))/(x^(2)-14 x+48)÷(x)/(x^(2)-64)
Answer:

Perform the following operation and express in simplest form.\newlinex46x3x214x+48÷xx264 \frac{x^{4}-6 x^{3}}{x^{2}-14 x+48} \div \frac{x}{x^{2}-64} \newlineAnswer:

Full solution

Q. Perform the following operation and express in simplest form.\newlinex46x3x214x+48÷xx264 \frac{x^{4}-6 x^{3}}{x^{2}-14 x+48} \div \frac{x}{x^{2}-64} \newlineAnswer:
  1. Factor Denominator: Factor the denominator of the first fraction and the numerator and denominator of the second fraction.\newlineThe denominator x214x+48x^2 - 14x + 48 can be factored into (x6)(x8)(x-6)(x-8) because 6×8=486\times8 = 48 and 6+8=146+8 = 14.\newlineThe numerator xx of the second fraction remains the same.\newlineThe denominator x264x^2 - 64 is a difference of squares and can be factored into (x+8)(x8)(x+8)(x-8).
  2. Rewrite as Multiplication: Rewrite the division as multiplication by the reciprocal.\newlineThe division of two fractions can be rewritten as the multiplication of the first fraction by the reciprocal of the second fraction.\newline(x46x3)/(x214x+48)÷(x)/(x264)=(x46x3)/(x214x+48)×(x264)/(x)(x^{4}-6x^{3})/(x^{2}-14x+48) \div (x)/(x^{2}-64) = (x^{4}-6x^{3})/(x^{2}-14x+48) \times (x^{2}-64)/(x)
  3. Factor Numerator: Factor the numerator of the first fraction if possible.\newlineThe numerator x46x3x^4 - 6x^3 can be factored by taking out the common factor x3x^3, which gives us x3(x6)x^3(x - 6).
  4. Cancel Common Factors: Cancel out common factors.\newlineNow we have x3(x6)/(x6)(x8)×(x+8)(x8)/xx^3(x - 6)/(x-6)(x-8) \times (x+8)(x-8)/x. We can cancel out the common factors (x6)(x-6) and (x8)(x-8) from the numerator and denominator.\newlineThis leaves us with x3/(x8)×(x+8)/xx^3/(x-8) \times (x+8)/x.
  5. Cancel Factor of xx: Cancel out the common factor of xx. We can cancel out the xx from the numerator of the second fraction and the denominator of the first fraction. This leaves us with x2(x+8)x^2 * (x+8).
  6. Multiply Expressions: Multiply the remaining expressions.\newlineNow we multiply x2x^2 by (x+8)(x+8) to get the final simplified form.\newlinex2(x+8)=x3+8x2x^2 * (x+8) = x^3 + 8x^2.

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