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
Ainat [17]
3 years ago
15

Prove that 3(x+1)(x+7)-(2x+5)² is never positive

Mathematics
2 answers:
scZoUnD [109]3 years ago
3 0

Step-by-step explanation:

3(x + 1)(x + 7) − (2x + 5)²

3(x² + 8x + 7) − (4x² + 20x + 25)

3x² + 24x + 21 − 4x² − 20x − 25

-x² + 4x − 4

-(x² − 4x + 4)

-(x − 2)²

A squared number is never negative (provided x is a real number), so -(x − 2)² is never positive.

Reika [66]3 years ago
3 0

Answer:

-27x - 219

Step-by-step explanation:

3x+3 * 3x+21 - 6x+15

9x+6 - (6x+15 * 6x+15)

9x+6 - 36x+325

-27x - 219

You might be interested in
This should be some simple math with some steps but i really need help beause i dont understand the problems
olga nikolaevna [1]
I don’t understand it either
6 0
3 years ago
Divide. Give the quotient and remainder. 426÷8
Anna007 [38]
We can start to solve this problem like how we solve any division problem. Since 8 doesn't go evenly into 4, we can move one digit to right, giving us the number 42. 42 divided by 8 is 5, so we write 5 on top of the division bar and keep working. Since 42-40 is 2, there's still 2 remained after doing that. Now we can bring down the 6, turning the number into 26. 26 divided by 8 is 3 remained 2, so we can put the three next to the 5. Since we have two remained and no more numbers, that means that the answer to 426/8 is 53 remainder 2. 
8 0
2 years ago
I giveee brainlilsttt
EastWind [94]

Answer:

-5,1

Step-by-step explanation:

hope that helps

:))))))

5 0
2 years ago
Where is the center of the largest circle that you could draw inside a given triangle? . A.the point of concurrency of the media
juin [17]

The <em><u>correct answer</u></em> is:

C.the point of concurrency of the angle bisectors of the triangle

Explanation:

The largest circle that can be drawn inside a triangle is called an inscribed circle.  The center of this circle is called the incenter.

The incenter is formed by the intersection of the angle bisectors of all 3 angles in the triangle.

5 0
3 years ago
Read 2 more answers
Does (3/2)^2 equal 2
Viktor [21]

Answer:

no

Step-by-step explanation:

3/2*3/2= 9/4

9/4= 2 1/4

3 0
3 years ago
Other questions:
  • A town has two trucks to collect garbage. When both truck are in use, they take 6 hours to collect all the garbage. When only th
    15·1 answer
  • What is .43 as a fraction
    7·1 answer
  • How is selective boarding school will only admit students who plays at least 2 .5 standard deviation above the mean on a standar
    6·1 answer
  • The surface area of a triangular prism is 18: square inches. What is the surface area of a similar solid that has been enlarged
    13·1 answer
  • A 6-inch candle is burning at a linear rate. The candle measures four inches two
    5·1 answer
  • Use substitution to solve y= 4x - 6 and 5x +3y = -1<br><br>HELP ASAP PLEASE!!!
    5·1 answer
  • Find the value of x.
    9·1 answer
  • Use the graph below to answer the questions that follow.
    6·2 answers
  • Linear or nonlinear: <br> why?
    15·2 answers
  • Fill in the blanks below with the correct units.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!