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
Marianna [84]
3 years ago
6

GIVING BRAINLIEST PLS HELP

Mathematics
2 answers:
baherus [9]3 years ago
7 0

Hi! Your answer is x - 5

Please see an explanation for a better and clear understanding to your problem!

Any questions about my answer and explanation can be asked through comments! :)

Step-by-step explanation:

To find an expression that is a factor, we simply factor the expression first. Sound a bit confusing? Well It's not that confusing if you understand it.

So what we need to do is to factor the expression first.

\huge{x^3-2x^2-15x}

Notice anything? Yes, the whole expression has x-term as a variable. We can simply factor the expression by common factor, pulling the variable with the least degree.

We should get \large{x(x^2-2x-15)} from common factor. However, we can still factor inside the brackets. Inside the bracket, the expression can be factored by two brackets factor. Our x-term which is outside of bracket is a bit useless so you can ignore it. What we want is to factor the expression inside the bracket.

\large{x^2-2x-15}

To factor this kind of expression, we use two brackets factoring for a = 1.

\large{(x-a)(x-b)}

To find the first term, we simply multiply x and x to each others.

To find the second term, we add -bx and -ax to each others.

To find the first term, we multiply -a and -b to each others.

So if we follow these steps, our (x-a)(x-b) should be x²-ax-bx+ab = x²-(a+b)x+ab

\large{x^2-(a+b)x+ab}

We only need to find a and b value. Which two numbers multiplying each others and get -15? There are only -5 and 3 or 3 and -5.

That means -5 and 3 | 3 and -5 are our only options.

But what two numbers adding up each others and get -2? That means it's -5 and 3 because -5+3 = -2.

Therefore, from x²-2x-15. Our factors are (x-5)(x+3)

So when the expression is completely factored, the new factored expression is x(x-5)(x+3) Then we look at the choices to see if there are these factors in the choices. From the choices and the expression, the only correct answer is (x-5) because x+5 is not a factor (it doesn't appear), same with other two choices. They seem to be factored but not fully factored.

Hence, the answer is x - 5

creativ13 [48]3 years ago
6 0

Answer:

A) x-5

Step-by-step explanation:

(x-5)(x^2+3x) = x^3-2x^2 -15

You might be interested in
Pls help, will mark brainliest if right
Tanya [424]

Answer:

D

Step-by-step explanation:

I just did this lol

6 0
3 years ago
Juan will spend at most on gifts. So far, he has spent . What are the possible additional amounts he will spend?
Andru [333]

Can you send a photo of it? I can't understand

7 0
3 years ago
21. If the area of the plane shape below is<br>36cm, find its height.​
mariarad [96]

Answer:

4 cm

Step-by-step explanation:

The figure is a parallelogram with area (A) calculated as

A = bh ( b is the base and h the perpendicular height )

Here A = 36 and b = 9 , thus

9h = 36 ( divide both sides by 9 )

h = 4 cm

4 0
3 years ago
Read 2 more answers
What is 1000 less than 1416
lara31 [8.8K]
1,416 - 1,000 = 416
6 0
3 years ago
Read 2 more answers
What is the value of the expression “two less than six times the difference of a number and five" when n =
Vinvika [58]
It’s 16 because Ik I did it before so do y worry
8 0
2 years ago
Other questions:
  • This question is about Non-Special Radian Families. It states: Find the family members for the (9π/10) family.
    7·1 answer
  • A rectangle has an area of K + 19k + 60 square inches. If the value of k and the dimensions of the rectangle are all natural
    11·2 answers
  • I really need help on my math
    9·1 answer
  • I NEEED HEEELLLPP
    7·1 answer
  • 1/5x2/5 how do you multiply fractions? plz show steps
    5·1 answer
  • PLEASE HELP! 10 POINTS.
    6·2 answers
  • 2m · 2n would be the same as _____.<br><br> A) 4 mn<br> B) 2 m + n<br> C) 2 mn<br> D) 2 m - n
    13·2 answers
  • Given f(x)=4x - 7 8x +8<br> what is the end behavior of the function?
    15·1 answer
  • A cone has a volume of 37.68cm3. If the height of the cone is 9cm what is the radius of the cone's
    8·1 answer
  • Which scatter plot shows a negative linear association?<br> A. <br><br> B. <br><br> C. <br><br> D.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!