Q. Fully simplify the expression below and write your answer as a single fraction.x4−10x32x4−8x2⋅4x2+36x+56x+7Answer:
Factor Numerator and Denominator: First, factor the numerator and the denominator of the first fraction.The numerator 2x4−8x2 can be factored by taking out the common factor of 2x2, resulting in 2x2(x2−4).The denominator x4−10x3 can be factored by taking out the common factor of x3, resulting in x3(x−10).
Factor Second Fraction: Now, factor the numerator and the denominator of the second fraction. The numerator x+7 is already in its simplest form. The denominator 4x2+36x+56 can be factored by grouping. We can factor out a 4, resulting in 4(x2+9x+14). Then, we can factor the quadratic as 4(x+2)(x+7).
Combine and Cancel Common Factors: Combine the factored forms of the numerator and denominator to rewrite the original expression.The expression becomes (2x2(x2−4))/(x3(x−10))×(x+7)/(4(x+2)(x+7)).
Simplify Expression: Next, we can cancel out common factors from the numerator and the denominator across the fractions.The (x+7) terms cancel each other out. We are left with x3(x−10)2x2(x2−4)×4(x+2)1.
Recognize Difference of Squares: Now, we can simplify the expression further by canceling out any common factors. The x2 term in the numerator can cancel out two x's from the x3 term in the denominator. We are left with x(x−10)2(x2−4)×4(x+2)1.
Substitute Factored Form: We can now simplify the expression (x2−4) by recognizing it as a difference of squares.The expression x2−4 can be factored into (x+2)(x−2).
Cancel Common Terms: Substitute the factored form of x2−4 into the expression.We now have (2(x+2)(x−2))/(x(x−10))×1/(4(x+2)).
Combine Remaining Factors: Cancel out the common (x+2) terms from the numerator and the denominator.We are left with x(x−10)2(x−2)×41.
Final Simplified Expression: Combine the remaining factors to form a single fraction.The expression simplifies to (2(x−2))/(4x(x−10)).
Final Simplified Expression: Combine the remaining factors to form a single fraction. The expression simplifies to (2(x−2))/(4x(x−10)).Finally, we can simplify the fraction by dividing both the numerator and the denominator by 2. The final simplified expression is (x−2)/(2x(x−10)).
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