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Use the remainder theorem for x^3+8x^2+11x-20 by x+4. Use the remainder theorem for x^3+8x^2+11x-20 by x-5.

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Answer:

the remainder for both expressions is zero

Explanation:

  1. (x+4)=0
  2. x=-4
  3. x³+8x²+11x-20, where x=-4
  4. (-4)³+8(-4)²+11(-4)-20
  5. -64+128-44-20
  6. 0, Hence it has no remainder
  • (x+5)=0
  1. x=-5
  2. x³+8x²+11x-20, where x=-5
  3. (-5)³+8(-5)²+11(-5)-20
  4. -125+200-55-20
  5. 0, hence it has no remainder
User Diego Ferruchelli
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