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Simplifique: (𝑥−1)(𝑥−2)(2𝑥3−3𝑥2−2𝑥−1)(x−1)(x−2)(2x 3 −3x 2 −2x−1)A ) 2𝑥5−9𝑥4+11𝑥3−𝑥2−𝑥−22x 5 −9x 4 +11x 3 −x 2 −x−2B ) 2𝑥5−9𝑥4−11𝑥3−𝑥2−𝑥−12x 5 −9x 4 −11x 3 −x 2 −x−1C ) 2𝑥5−9𝑥4+11𝑥3−𝑥2−𝑥+12x 5 −9x 4 +11x 3 −x 2 −x+1

Question

Simplifique: (𝑥−1)(𝑥−2)(2𝑥3−3𝑥2−2𝑥−1)(x−1)(x−2)(2x 3 −3x 2 −2x−1)A ) 2𝑥5−9𝑥4+11𝑥3−𝑥2−𝑥−22x 5 −9x 4 +11x 3 −x 2 −x−2B ) 2𝑥5−9𝑥4−11𝑥3−𝑥2−𝑥−12x 5 −9x 4 −11x 3 −x 2 −x−1C ) 2𝑥5−9𝑥4+11𝑥3−𝑥2−𝑥+12x 5 −9x 4 +11x 3 −x 2 −x+1

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Solution

Claro, vamos a simplificar la expresión paso a paso.

La expresión dada es: (x1)(x2)(2x33x22x1) (x-1)(x-2)(2x^3 - 3x^2 - 2x - 1)

Primero, simplificamos los factores (x1)(x-1) y (x2)(x-2): (x1)(x2)=x23x+2 (x-1)(x-2) = x^2 - 3x + 2

Ahora multiplicamos este resultado por el polinomio 2x33x22x12x^3 - 3x^2 - 2x - 1: (x23x+2)(2x33x22x1) (x^2 - 3x + 2)(2x^3 - 3x^2 - 2x - 1)

Distribuimos cada término del primer polinomio con cada término del segundo polinomio:

  1. x22x3=2x5x^2 \cdot 2x^3 = 2x^5

  2. x2(3x2)=3x4x^2 \cdot (-3x^2) = -3x^4

  3. x2(2x)=2x3x^2 \cdot (-2x) = -2x^3

  4. x2(1)=x2x^2 \cdot (-1) = -x^2

  5. 3x2x3=6x4-3x \cdot 2x^3 = -6x^4

  6. 3x(3x2)=9x3-3x \cdot (-3x^2) = 9x^3

  7. 3x(2x)=6x2-3x \cdot (-2x) = 6x^2

  8. 3x(1)=3x-3x \cdot (-1) = 3x

  9. 22x3=4x32 \cdot 2x^3 = 4x^3

  10. 2(3x2)=6x22 \cdot (-3x^2) = -6x^2

  11. 2(2x)=4x2 \cdot (-2x) = -4x

  12. 2(1)=22 \cdot (-1) = -2

Sumamos todos estos términos: 2x53x42x3x26x4+9x3+6x2+3x+4x36x24x2 2x^5 - 3x^4 - 2x^3 - x^2 - 6x^4 + 9x^3 + 6x^2 + 3x + 4x^3 - 6x^2 - 4x - 2

Agrupamos términos semejantes: 2x5+(3x46x4)+(2x3+9x3+4x3)+(x2+6x26x2)+(3x4x)2 2x^5 + (-3x^4 - 6x^4) + (-2x^3 + 9x^3 + 4x^3) + (-x^2 + 6x^2 - 6x^2) + (3x - 4x) - 2

Simplificamos: 2x59x4+11x3x2x2 2x^5 - 9x^4 + 11x^3 - x^2 - x - 2

Por lo tanto, la respuesta correcta es: A)2x59x4+11x3x2x2 A) 2x^5 - 9x^4 + 11x^3 - x^2 - x - 2

This problem has been solved

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