trapperwilson trapperwilson
  • 01-11-2017
  • Mathematics
contestada

X to the fourth power minus x to the third power plus 2x to the second power minus 4x minus
8=0

Respuesta :

tynollette tynollette
  • 01-11-2017
regroup:
(x^4+2x^2-8)-(x^3+4x)=0
Factor: (x^2-2)(x^2+4)-x(x^2+4)=0
both terms have (x^2+4), so (x^2+4)(X^2-x-2)=0
factor again: (x^2+4)(x+1)(x-2)=0
x=1, x=2, x=2i, or x=-2i
Answer Link

Otras preguntas

What is a scale on a map?
Factor the expression -10x^2-41x-21
What's 45 out of 58 in percentage?
1.133 g of silver nitrate was heated in an open tube. The silver residue weighed 0.720 g. During the reaction 0.307 g of nitrogen dioxide was also produced. Th
wallpaper cost $2 per square yard how much would it cost to cover a rectangular wall that measures 15 feet by 21 feet
how to Express each decimal as a fraction or a mixed number in a simplest form ? I need help with -0.14
how do you solve 4a/b divided by 2ac/b
Explain how you would use a number line to find 6+(-8)
What is the coefficient of x in the expression x-2? Explain your reasoning.
the 42 foot tree casts a shadow of 63 feet. how long is a shadow of a 5 foot girl who is standing near it