Q. Perform the following operation and express in simplest form.4x−20x+1÷x2+x−2x2−1Answer:
Simplify Expression: First, we need to simplify the expression by changing the division to multiplication by the reciprocal of the second fraction. (x+1)/(4x−20)÷(x2−1)/(x2+x−2)=(x+1)/(4x−20)×(x2+x−2)/(x2−1)
Factor Polynomials: Next, we factor each polynomial if possible.The first denominator 4x−20 can be factored out as 4(x−5).The second numerator x2+x−2 can be factored into (x+2)(x−1).The second denominator x2−1 is a difference of squares and can be factored into (x+1)(x−1).So, we rewrite the expression with factored terms:(x+1)/(4(x−5))×((x+2)(x−1))/((x+1)(x−1))
Cancel Common Factors: Now, we cancel out the common factors in the numerator and the denominator.The (x+1) in the first numerator and the second denominator cancel out, as do the (x−1) in the second numerator and denominator.This leaves us with:41×(x−5)(x+2)
Multiply Remaining Terms: Finally, we multiply the remaining terms.(41)×x−5x+2=4(x−5)x+2This is the expression in its simplest form.
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