Respuesta :

20coco20
Answer:
X^5+3x^4+81x+ 243

Step by step:
X^4*x=x^5
X^4*3=3x^4
81*x=81x
81*3=243
SoccerHalo

Answer:

x³+27

Step-by-step explanation:

x^4+81÷x+3 -----> using the law of exponents x^4 - x = x³

step 2)

81 ÷ 3 = 27

final answer: x³+27