Question

How do I do this please help

Answer 1

Answer:

C) 4,0

Step-by-step explanation:

Basically to find zeros you set up the expression equal to zero.

First pair is (0,0) they derived this by setting the leftmost x to 0 so x=0, this meant that when x was plugged back into the equation y = x(x-4) the y value we got out was 0 because y = 0 (0-4) = 0, thus the pair (0,0).

For second pair, we set up x-4= 0, solve this to get x = 4 (add 4 to both sides). Now plug this back into full equation y= 4 (4-4)= 0, you get y=0 and your ordered pair is (4,0) which is the second pair of zero.

Zero are x-intercept where y is zero which is the main reason why we setup x=0 or x-4=0 to start with.

Answer 2

Hi there!  

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I believe your answer is:  

[answer]  

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Here’s why:  

• According to the question, the factored form of the given quadradic expression is: $x(x-4)$.
• I have graphed this on a graphing program.

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• When graphed, the parabola passes the points (0,0) and (4,0). They are the zeros.

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• Option C (4,0) would be the other 'zero'.

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See graph attached.

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Hope this helps you. I apologize if it’s incorrect.