227k views
5 votes
What about this one ?

What about this one ?-example-1
User Jan Gray
by
7.7k points

2 Answers

5 votes
We need to find 0 so what we would do is replace the x with 3 as the question is asking and solve from there.

Let me demonstrate by using an example:

x = 4

6+x= 10

6+4=10

In this example, I replaced the x with 4 which resulted in 10.

Now, let's solve!

The answer is the third option because it results 0 and I will show you why!

First, we replace the x with 3

(3+20)(3-3)

Using our knowledge of PEMDAS we would first solve what's inside the parentheses and then multiply!

3+20= 23 and 3-3=0

Now, we multiply 23*0 and we got the answer of 0 which is what the problem is asking for.

Therefore, the correct answer is the third option or (x+20)(x-3)

User Mintobit
by
7.7k points
1 vote
The options are given in factored form.

If a function is zero at x=3, this means x=3 is a root of the equation. x = 3 can also be written as x - 3 = 0

So, if x = 3 is a root of the equation, x - 3 will be a factor of the function. From the given options we can see only Option C contains x - 3 as its factor. Substitute x = 3 in option C and the function value will be zero.

So, the correct answer is option C
User Khan
by
8.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories