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Perform the following operation and express in simplest form.

(x+1)/(4x-20)÷(x^(2)-1)/(x^(2)+x-2)
Answer:

Perform the following operation and express in simplest form.\newlinex+14x20÷x21x2+x2 \frac{x+1}{4 x-20} \div \frac{x^{2}-1}{x^{2}+x-2} \newlineAnswer:

Full solution

Q. Perform the following operation and express in simplest form.\newlinex+14x20÷x21x2+x2 \frac{x+1}{4 x-20} \div \frac{x^{2}-1}{x^{2}+x-2} \newlineAnswer:
  1. Simplify Expression: First, we need to simplify the expression by changing the division to multiplication by the reciprocal of the second fraction. (x+1)/(4x20)÷(x21)/(x2+x2)=(x+1)/(4x20)×(x2+x2)/(x21)(x+1)/(4x-20) \div (x^2-1)/(x^2+x-2) = (x+1)/(4x-20) \times (x^2+x-2)/(x^2-1)
  2. Factor Polynomials: Next, we factor each polynomial if possible.\newlineThe first denominator 4x204x-20 can be factored out as 4(x5)4(x-5).\newlineThe second numerator x2+x2x^2+x-2 can be factored into (x+2)(x1)(x+2)(x-1).\newlineThe second denominator x21x^2-1 is a difference of squares and can be factored into (x+1)(x1)(x+1)(x-1).\newlineSo, we rewrite the expression with factored terms:\newline(x+1)/(4(x5))×((x+2)(x1))/((x+1)(x1))(x+1)/(4(x-5)) \times ((x+2)(x-1))/((x+1)(x-1))
  3. Cancel Common Factors: Now, we cancel out the common factors in the numerator and the denominator.\newlineThe (x+1)(x+1) in the first numerator and the second denominator cancel out, as do the (x1)(x-1) in the second numerator and denominator.\newlineThis leaves us with:\newline14×(x+2)(x5)\frac{1}{4} \times \frac{(x+2)}{(x-5)}
  4. Multiply Remaining Terms: Finally, we multiply the remaining terms.\newline(14)×x+2x5=x+24(x5)(\frac{1}{4}) \times \frac{x+2}{x-5} = \frac{x+2}{4(x-5)}\newlineThis is the expression in its simplest form.

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