![apexdude2020](/avatars/12257.jpg)
apexdude2020
27.12.2019 •
Mathematics
Identify all real roots of the equation: x^4 - 9x^2 + 20 = 0. show work
Solved
Show answers
More tips
- S Society and Politics Secrets of NATO: Which Countries are Part of the Alliance?...
- H Health and Medicine Is Massage Necessary? Facts and Opinions...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Mathematics
- M Mathematics Is (-2,9) and (1,-9) a positive slope...
- M Mathematics Plz help me solve this stats question......
- M Mathematics The following equation represents the amount of snow in inches (s) on the ground after each hour (h) in Cincinnati: s=hThe graph above shows the amount of snow in Chicago at...
- M Mathematics What is the value of sec Theta in the triangle below?...
- M Mathematics A string of kite 100 meters long and it makes an angle of 60 degrees with horizontal. If the person is holding the string 0.8 m from the ground, find the height of kite from...
- M Mathematics A student was given two data sets, Set A and Set B. Which of the followin statements is true?...
- M Mathematics Going into a recent election, only about local middle school recently reported that enrollment increased to 108% percent of last year. If enrollment last year was at 17,113,...
- M Mathematics Help I really need to go to bed now...
- M Mathematics Which of the following probabilities is the greatest for a standard normal distribution?P (negative 1.5 less-than-or-equal-to z less-than-or-equal-to negative 0.5) P (negative...
- M Mathematics What’s the term for the photo below ? It’s some more like this too...
Ответ:
use u subsitution
u=x²
we get
u²-9u+20=0
factor
what 2 numbers multiply to get 20 and add to get -9
-4 and -5
(u-4)(u-5)=0
u=x²
(x²-4)(x²-5)=0
factor again
(x-2)(x+2)(x-√5)(x+√5)=0
set equal to zero
x-2=0
x=2
x+2=0
x=-2
x-√5=0
x=√5
x+√5=0
x=-√5
x=-2,-√5,√5,2
Ответ:
Exponential growth is a specific way that a quantity may increase over time. It occurs when the instantaneous rate of change (that is, the derivative) of a quantity with respect to time is proportional to the quantity itself. Your Welcome.