Q. Perform the following operation and express in simplest form.x2−5x−24x2+3x÷x2−644x+32Answer:
Factor Denominators and Numerator: First, we need to factor the denominators and the numerator of the second fraction if possible to simplify the expression.The denominator x2−5x−24 can be factored into (x−8)(x+3).The denominator x2−64 is a difference of squares and can be factored into (x−8)(x+8).The numerator 4x+32 can be factored out by 4 to get 4(x+8).
Rewrite Using Factored Forms: Now we rewrite the original expression using the factored forms: ((x−8)(x+3)x2+3x)÷((x−8)(x+8)4(x+8)).
Multiply by Reciprocal: Division of fractions is the same as multiplying by the reciprocal. So we take the reciprocal of the second fraction and multiply:((x−8)(x+3)x2+3x)⋅(4(x+8)(x−8)(x+8)).
Cancel Common Factors: We can now cancel out the common factors in the numerator and the denominator. The (x+8) terms cancel out: ((x−8)(x+3))(x2+3x)×4(x−8).
Expand Numerator: Now we multiply the numerators and the denominators:Numerator: (x2+3x)∗(x−8)Denominator: (x−8)(x+3)∗4
Simplify Numerator and Denominator: We expand the numerator: x2⋅(x−8)+3x⋅(x−8)=x3−8x2+3x2−24x=x3−5x2−24x
Divide by 4: We notice that the (x−8) term in the numerator and the denominator will cancel out: rac{x^3 - 5x^2 - 24x}{4(x + 3)}
Further Simplify Numerator: Now we simplify the expression by dividing each term in the numerator by 4:(4x3−45x2−424x)/(x+3)
Final Simplification: Simplify the numerator further: x+3x3/4−5x2/4−6x
Final Simplification: Simplify the numerator further: (4x3−45x2−6x)/(x+3)The expression is now simplified, and we cannot simplify it further because the numerator and denominator do not have any common factors.
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