1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Neko [114]
2 years ago
11

1. If x³ +3x²-4=0 has x=-2 as a root (zero), find the other two roots.

Mathematics
1 answer:
castortr0y [4]2 years ago
6 0

Answer:

1 and -2 (has a multiplicity of 2)

Step-by-step explanation:

so since x=-2 is a root then (x+2) is a factor of the polynomial. This means you can divide the polynomial by (x+2) by using synthetic or long division. So for this example I'll using synthetic division which is much more simple than long division

-2 | 1   3    0   -4

         -2   -2    4

     1    1    -2   0

(x+2)(x²+x-2)

Now you can factor the quadratic into

(x+2)(x-1)

x+2 = 0

x = - 2

x-1 =0

x = 1

You might be interested in
Find the distance between (6, -2) and (1, -2).
Scilla [17]

Answer:

it is 5 units

Step-by-step explanation:

All you have to do for this one is subtract 6-1 which equal 5 units. This only works in this one because is says at the end -2 on both the numbers.

8 0
3 years ago
Help I don't understand
Leona [35]
150 student voted for later start.
8 0
3 years ago
Is 7,434 divisible by 6 true are false
kogti [31]
<span>7,434 is divisible by 6 so this is true

</span>
3 0
3 years ago
you have at most $20.25 to spend at a store. Shirts cost $11.50 each, and pants cost $16 each. Let s be numbers of shirts and p
Readme [11.4K]

is this an algebra class? if so it just

11.50x + 16y = 20.25

4 0
3 years ago
A rectangle has a height of 2x4 and a width of x2 + 8x + 15.
aliina [53]

Answer:

2x⁶ + 16x⁵ + 30x⁴

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • What are the center and radius of the circle defined by the equation x2 + y2 -6 x + 10y + 25 = 0
    10·2 answers
  • A high school coach wants to buy new athletic shorts for the 15 members of the basketball team. The coach must spend less than $
    7·2 answers
  • Joy organised a large wedding . Guests had to choose their meals from beaf ,chicken or vegetarian. 1/3 of the guests chose beaf
    10·1 answer
  • Ann is buying a house that costs $250,000. She is making a down payment of 15 percent, and her closing costs will amount to 3 pe
    6·1 answer
  • What is 48% of 225?<br> plz help
    8·2 answers
  • Find the angle of arc BC
    7·1 answer
  • Please help me with this its getting late and im almost done
    13·1 answer
  • The number of copies made each week by teachers at Lamley High School follows a bell-shaped distribution with a
    5·1 answer
  • Alex has a bag of marbles. Each marble is red, blue, or yellow , and the ratio of the red to blue to yellow marbles is 6:10:15.
    5·1 answer
  • Find the Function and Solution in 2 different parts.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!