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
damaskus [11]
3 years ago
13

(a-b) (a+b)?? How do you solve this equation?

Mathematics
2 answers:
garik1379 [7]3 years ago
5 0
Distribute the first +a to the +a and multiply, then multiply the same +a and the +b and then multiply the -b and the +a and then the -b and the +b. 

Hope this helped, if you have any more questions about this, just ask.
gregori [183]3 years ago
5 0
You can use a system called foil.
1. a*a= a^2
2. a*b= ab
3. -b*a= -ab
4. -b*b= -bb
a^2+ ab -ab-bb= a^2-bb
(Positive ab is canceled out by negative ab)
You might be interested in
When you substitute a value for x or y, you are x or y with a value.
Hitman42 [59]

Step-by-step explanation:

See whenever we have two variables like x and y.

And also we have given two equations in terms of x and y.

Example: ax + by = p  and cx + dy = q

In order to get the solution, we need to find the value of x and y using the given two equations.

So here what we can do is:

Consider any one equation and get x or y from that equation.

i.e consider ax + by = p  or x = \frac{1}{a}*(p-by)

Now plug value of x (or y) from the equation you have considered into the another equation.

i.e c(\frac{1}{a}*(p-by))+dy = q

Now solve this equation to get y (or x).

and after that we can find the other variable.


4 0
2 years ago
Read 2 more answers
. 7/8 = /48<br> A. 6<br> B. 1<br> C. 13<br> D. 42
hodyreva [135]
 7/8=x/48

x=(7/8)48
x=(7)(48/8)
x=(7)(6)
x=42
                D.42

4 0
3 years ago
Three students failed their last test. If 12% of the class failed, how many students are in the class?
stellarik [79]

Answer:

There are 25 students in the class.

Step-by-step explanation:

Let x be the number of students in the class

12% failed and the number of students is 3

x*12% = 3

x*.12 = 3

Divide each side by .12

x * .12 /.12 = 3/.12

x =25

There are 25 students in the class

3 0
3 years ago
Read 2 more answers
Madison bought a dress priced at $98.25. The dress was 20% off. If she purchases the dress, what would the discounted price be?
RoseWind [281]

Answer:

C. $19.65

Step-by-step explanation:

You have to find 20% of $98.25

This is equal to,

20% * $98.25                Because of usually means multiplication

= .20 * 98.25                 Because .20 = 20%

= 19.65!

7 0
2 years ago
Evaluate the expression shown below and write your answer as a fraction in simplest form. 1 - 5 ———————- 1 1 — + —- 12 8
koban [17]

Answer:

9/14

Step-by-step explanation:

The question is not clear enough. Here is a similar question as shown in the attachment

Given the expression

-3/2 ÷ -7/3

= -3/2 ×-3/7

= (-3*-3)/(2*7)

= 9/14

Hence the equivalent result expressed as a fraction is 9/14

4 0
2 years ago
Other questions:
  • Choose the congruence theorem that you would use to prove the triangles congruent.
    11·2 answers
  • Find the inverse<br> f(x)=3x-2
    5·1 answer
  • the management of a hotel found that they will sell all 800 tickets at 4 dollars per per person for a hour concert for one night
    7·1 answer
  • the scores in physics test of 10 students are as follows:10,11,8,10,12,8,10,11,12,10. find its median,mean,mode
    7·1 answer
  • One circle has a 96 cm diameter and another circle has a 295.16 cm circumference. Which circle has a larger radius?
    15·2 answers
  • What is the value of the expression below when
    10·2 answers
  • Translate this word problem as a system of equations and then solve using substitution.
    7·1 answer
  • If a star is measured to have a parallax angle of 0.5 arcsec, how far away is the star?
    12·1 answer
  • Please help! Brainliest and 5 star given
    13·1 answer
  • Suppose you have developed a scale that indicates the brightness of sunlight. Each category in the table is 4 times brighter tha
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!