Q. Fully simplify the expression below and write your answer as a single fraction.2x5−10x4−12x34x5−28x4−32x3⋅x2−13x+40x−6Answer:
Factor Common Terms: First, factor out the common terms in the numerator and the denominator of the first fraction. The numerator can be factored by taking out 4x3, and the denominator can be factored by taking out 2x3.
Factor Quadratic Expressions: After factoring, the expression becomes: (4x3(x2−7x−8))/(2x3(x2−5x−6))Now, factor the quadratic expressions in the parentheses.
Cancel Common Terms: The quadratic x2−7x−8 can be factored into (x−8)(x+1). The quadratic x2−5x−6 can be factored into (x−6)(x+1).
Simplify Second Fraction: Now, the expression looks like this:(4x3(x−8)(x+1))/(2x3(x−6)(x+1))Notice that (x+1) and x3 can be canceled out from the numerator and the denominator.
Multiply Fractions: After canceling, the expression simplifies to: (4(x−8))/(2(x−6))Now, let's simplify the second fraction (x−6)/(x2−13x+40).
Cancel Terms: The quadratic x2−13x+40 can be factored into (x−5)(x−8). So, the second fraction becomes (x−6)/((x−5)(x−8)).
Simplify Constant Terms: Now, multiply the simplified first fraction by the second fraction: (2(x−6)4(x−8))×(x−5)(x−8)x−6Notice that (x−8) can be canceled out from the numerator of the first fraction and the denominator of the second fraction.
Final Simplified Expression: After canceling, the expression simplifies to:(2(x−6)4)×(x−5)(x−6)Now, (x−6) can be canceled out from the numerator of the second fraction and the denominator of the first fraction.
Final Simplified Expression: After canceling, the expression simplifies to:(4)/(2(x−6))×(x−6)/(x−5)Now, (x−6) can be canceled out from the numerator of the second fraction and the denominator of the first fraction.After canceling, the expression simplifies to:(4)/(2)×(1)/(x−5)Simplify the constant terms by dividing 4 by 2, which equals 2.
Final Simplified Expression: After canceling, the expression simplifies to:(4)/(2(x−6))⋅(x−6)/(x−5)Now, (x−6) can be canceled out from the numerator of the second fraction and the denominator of the first fraction.After canceling, the expression simplifies to:(4)/(2)⋅(1)/(x−5)Simplify the constant terms by dividing 4 by 2, which equals 2.The final simplified expression is:2/(x−5)This is the fully simplified form of the original expression written as a single fraction.
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