Q. Fully simplify the expression below and write your answer as a single fraction.x4−2x3x5−2x4−48x3⋅15x2+30x−3605x2−30x+40Answer:
Factorize fractions: Factor the numerator and denominator of the first fraction.We have the first fraction as (x5−2x4−48x3)/(x4−2x3). We can factor out an x3 from both the numerator and the denominator.(x5−2x4−48x3)/(x4−2x3)=x3(x2−2x−48)/x3(x−2)
Factorize quadratic expressions: Factor the quadratic expression in the numerator.The quadratic expression x2−2x−48 can be factored into (x−8)(x+6).x3(x2−2x−48)/x3(x−2)=x3(x−8)(x+6)/x3(x−2)
Cancel common terms: Cancel out the common x3 term.The x3 term in the numerator and denominator cancels out.x3(x−2)x3(x−8)(x+6)=(x−2)(x−8)(x+6)
Factorize second fraction: Factor the numerator and denominator of the second fraction.We have the second fraction as (5x2−30x+40)/(15x2+30x−360). We can factor out a 5 from the numerator and a 15 from the denominator.(5x2−30x+40)/(15x2+30x−360)=5(x2−6x+8)/15(x2+2x−24)
Cancel common factors: Factor the quadratic expressions in the numerator and denominator.The quadratic expression x2−6x+8 can be factored into (x−4)(x−2), and x2+2x−24 can be factored into (x+6)(x−4).15(x2+2x−24)5(x2−6x+8)=15(x+6)(x−4)5(x−4)(x−2)
Multiply fractions: Cancel out the common factors and simplify the constants.The (x−4) term in the numerator and denominator cancels out, and we can simplify the constants 155 to 31.15(x+6)(x−4)5(x−4)(x−2)=(x+6)31(x−2)
Cancel common terms: Multiply the simplified first fraction by the simplified second fraction.Now we multiply (x−8)(x+6)/(x−2) by (1/3)(x−2)/(x+6).((x−8)(x+6)/(x−2))∗((1/3)(x−2)/(x+6))=(x−8)(x+6)(1/3)(x−2)/((x−2)(x+6))
Write final expression: Cancel out the common (x−2) and (x+6) terms.The (x−2) and (x+6) terms in the numerator and denominator cancel out.(x−8)(x+6)(31)(x−2)/((x−2)(x+6))=(31)(x−8)
Write final expression: Cancel out the common (x−2) and (x+6) terms.The (x−2) and (x+6) terms in the numerator and denominator cancel out.(x−8)(x+6)(31)(x−2)/((x−2)(x+6))=(31)(x−8)Write the final simplified expression.The final simplified expression is (31)(x−8), which is the same as 3x−8.
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