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]
2 years ago
6

GIVING BRAINLIEST PLS HELP

Mathematics
2 answers:
baherus [9]2 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]2 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
Write and graph an inequality that represents the numbers that are not solutions of each inequality.
o-na [289]
A.) x + 8 < 14
-8 -8
x < 6
b.) x - 12 >/= 5.7
+12 +12
x >/= 17.7
8 0
3 years ago
2.75j + 2.25 - 1.5j + 3 simplified
sergiy2304 [10]
You can say 2.75j - 1.5j = 1.25j and 2.25+3 = 5.25 so now you have : 
1.25j + 5.25 and thats simplify :)))
i hope this is helpful 
have a nice day 
4 0
3 years ago
Read 2 more answers
Totsakan spent $36.54 on envelopes. If they cost 4.06/box how many boxes did her buy?
Ivahew [28]
9 because you divide 36.54 by 4.06 i’m pretty sure
4 0
3 years ago
Read 2 more answers
Emily earns $15 for each car she washes. Create an equation to represent the relationship between the number of cars washed, C,
scoundrel [369]

Answer:

An equation is c = 15m

Step-by-step explanation:

5 0
3 years ago
List 3 reasons you listen to music and tell how each influences your mood.
ANTONII [103]

Answer: It provides a total brain workout.” Research has shown that listening to music can reduce anxiety, blood pressure, and pain as well as improve sleep quality, mood, mental alertness, and memory.

6 0
3 years ago
Other questions:
  • Calculating the return on investment using financial leverage. suppose Dave invested only 20,000 of his own money and borrowed 1
    15·1 answer
  • BEST ANSWER GETS BRAINLIEST!!!!PLEASE HELLPP
    7·1 answer
  • Find the surface area of a sphere that has a volume of 288 cu. in.
    13·1 answer
  • What number is 7 units to the left of -1?<br><br> 8<br> 6<br> -8<br> -6
    14·1 answer
  • 90 POINTS!! Right answers will earn brainly.
    6·1 answer
  • 4. A case of 12 peanut snacks costs
    6·2 answers
  • Simplify 7/32 over 1/16
    6·2 answers
  • HELP ME PLEASEEEEEEEEEEEEE
    12·1 answer
  • What are the first three multiples on 4 , 5 and 10
    5·2 answers
  • Is -52/4 equal to -13
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!