Answered

Welcome to Westonci.ca, the place where your questions find answers from a community of knowledgeable experts. Explore comprehensive solutions to your questions from a wide range of professionals on our user-friendly platform. Discover detailed answers to your questions from a wide network of experts on our comprehensive Q&A platform.

16. If [tex]$x=3$[/tex], evaluate the expression [tex]$x^2-1$[/tex].

A. -5
B. 5
C. -8
D. 8

Sagot :

GinnyAnswer
To evaluate the expression [tex]\( x^2 - 1 \)[/tex] when [tex]\( x = 3 \)[/tex], follow these steps:

1. Substitute the value of [tex]\( x \)[/tex] into the expression:
[tex]\[ x = 3 \][/tex]
So, we substitute 3 for [tex]\( x \)[/tex] in the expression [tex]\( x^2 - 1 \)[/tex].

2. Calculate [tex]\( x^2 \)[/tex]:
[tex]\[ x^2 = 3^2 = 9 \][/tex]
This gives us the square of 3, which is 9.

3. Subtract 1 from the result:
[tex]\[ 9 - 1 = 8 \][/tex]

So, the value of the expression [tex]\( x^2 - 1 \)[/tex] when [tex]\( x = 3 \)[/tex] is 8.

Therefore, the correct choice is:
D. 8
We hope you found what you were looking for. Feel free to revisit us for more answers and updated information. Your visit means a lot to us. Don't hesitate to return for more reliable answers to any questions you may have. We're here to help at Westonci.ca. Keep visiting for the best answers to your questions.