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
uysha [10]
3 years ago
6

Factor completely: x2-4

Mathematics
1 answer:
Lelechka [254]3 years ago
5 0

Answer:

(x+2)(x-2)

Step-by-step explanation

x times x equals x^2, 2 times x equals 2x, -2 times x equals -2x, and 2 times -2 equals -4. If you add that up, the x-values cancel out, leaving the x^2 and the -4. (This explanation is working it backwards which is the easiest way IMO)

You might be interested in
Jim is investing in the stock market. Jim is hoping to earn $2,000 in interest in order to take a trip to Mexico. Stock A earns
Vanyuwa [196]

Given:

Total amount for investment = $32000

Rate of interest for Stock A = 4%

Rate of interest for Stock B = 7%

Jim is hoping to earn $2,000 in interest.

To find:

The amount of investments in Stock A and Stock B.

Step-by-step explanation:

Let amount of investments in Stock A = $x

Amount of investments in Stock B = $y

Total amount for investment = $32000

x+y=32000        ...(i)

Rate of interests in Stock A and Stock B are 4% and 7%. Total interests is $2000.

0.04x+0.07y=2000           ...(ii)

From (i) and (ii), we get

0.04x+0.07(32000-x)=2000

0.04x+2240-0.07x=2000

-0.03x=2000-2240

-0.03x=-240

Divide both sides by -0.03.

x=\dfrac{-240}{-0.03}

x=8000

Put x=8000 in (i).

8000+y=32000  

y=32000-8000  

y=24000  

Therefore, the amount of investments in Stock A and Stock B are $8000 and $24000 respectively.

8 0
2 years ago
Use the discriminant to determine the number and type of solutions for the following equation. 12x2 + 10x + 5 = 0
Paul [167]
Discriminant D is given by:
D=b²-4ac
Implication of discriminant is as follows:

D<0 two zeros that are complex conjugate
D=0 one real zero of multiplicity 2
D>0 two distinct real zers
D= (+ve perfet square)  two distinct rational zeros
From:
12x^2+10x+5=0
plugging in the equation we get:
10²-4×12×5
=100-240
=-140
thus
D<0

Answer is: 
<span>A two irrational solutions </span>
4 0
3 years ago
Read 2 more answers
Anyone want to help me with math
Xelga [282]

Ok, I am ready, what are the questions.

Tell me in the comment section

6 0
3 years ago
32=x+17 help me pls if can because I don't know
Natalka [10]
Subtract 17from both sides
32-17=x
Simplify 32-17 to 15
X=15
6 0
3 years ago
Read 2 more answers
Write a fraction that is equivalent to 7/10 = _ /_
labwork [276]
A fraction that is equivalent to \frac{a}{b} will have the form \frac{a\times A}{b\times B}, where A and B are equivalent and factors that are multiplied in.
The product fraction should be easily simplified using A and B to get the original fraction.

<em>In the case of your fraction </em>\frac{7}{10} you will need to find a fraction which is a product of this: \frac{7\timesA}{10\timesB},A=B
6 0
2 years ago
Other questions:
  • How would you write the absolute value of 5.23
    15·1 answer
  • PLEASE HELP NEED THIS TO PASS
    7·1 answer
  • Josh helps at the school fair for 3/8 of the day Sarai helps for 8/12 of the day write and solve a comparison question about the
    13·1 answer
  • Multiply the polynomials (x + 6)(2x - 2). What is the product in the form ax2 + bx +c?
    9·1 answer
  • Help? anyone<br> 8th grade math
    7·2 answers
  • The cost of a new smart watch at Walmart is
    5·1 answer
  • How is Demoragan's law used in logic ?
    7·2 answers
  • URGENT HELP PLEASEE SBDHHDS
    6·1 answer
  • Will give brainliest no files will report.
    7·2 answers
  • Santiago receives an allowance of $7 every week. how much total does he receive.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!