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
velikii [3]
3 years ago
14

Expand (3x+7)(3x-7) =

Mathematics
2 answers:
saveliy_v [14]3 years ago
8 0

Answer:

9 {x}^{2}  - 49

Step-by-step explanation:

Do FOIL, first outside inside last

3x × 3x = 9x^2

3x × -7 = -21x

7 × 3x = 21x

7 × -7 = -49

9 {x}^{2}   - 21x + 21x - 49 \: midde \: cancels \: each \: other \: out

So it would just be 9x^2 - 49

Tamiku [17]3 years ago
8 0

(3x + 7)(3x - 7) =

= 9x² + 21x - 21x - 49

= 9x² - 49

You might be interested in
3/4x + 2x - 3= -1/4 + 21
Lesechka [4]

x = 95/11 lmk if it’s wrong.

5 0
3 years ago
Hey guys,<br><br> Do you guys know the answer to this TTM problem?<br><br> Thank You!
tensa zangetsu [6.8K]
I think it is 2.5,2.5
4 0
3 years ago
The scale of a map is 1:1,000,000. What are the real distances between two points if the distance between them on this map is 35
Inessa [10]

35km; Since the points on the map are one millionth of their actual size, simply multiply by one million and convert from there.

35*1,000,000 = 35,000,000mm

35,000,000/1000 = 35,000m

35,000/1000 = 35km

8 0
4 years ago
Read 2 more answers
You and your friend each construct triangles with the angle measures 15 degrees, 125 degrees, and 40 degrees. Will both triangle
xxTIMURxx [149]

The two triangles will be similar (same shape, and each side of one triangle the same multiple of the corresponding side of the other triangle), but not necessarily the same size.

The key word here is "similar;" be sure you understand what that means in trig.


3 0
3 years ago
Find the product of the complex number and its conjugate. 1 + 2i
eduard
The answer to this question is:


Find the product of the complex number and its conjugate. 1 + 2i ??<span>(1+2i)
(1-2i)=
1^2+2^2=
5

Hoped This Helped, Trevorhardy
Your Welcome :)</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • Alex wrote the equation C= 2n describe a situation that this equation could represent
    15·1 answer
  • Please Help!!
    6·2 answers
  • A\b=c for bsolve for b and show your steps.show all steps.
    6·1 answer
  • How do I state if the polygons is similar?
    13·1 answer
  • a girl that is 5 ft tall casts a shadow 4 ft long. At the same time, a tree casts a shadow 24 ft long. How tall is the tree
    15·1 answer
  • Thomas has $6.35 in dimes and quarters. The number of dimes is three more than three times the number of quarters. How many quar
    13·1 answer
  • What is the slope of a line that is perpendicular to the line v=-1/3x-6
    11·1 answer
  • Is -0.85 greater less than or equal to -0.98
    5·1 answer
  • Write an explicit furmula for the question below <br> 40 points!!!!!!!!!!!!!
    7·1 answer
  • Can someone help me with this thank you
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!