Answered

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

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

Sagot :

GinnyAnswer
Sure! Let's solve the given expression step-by-step with [tex]\( x = 3 \)[/tex]:

The expression we need to evaluate is:
[tex]\[ x^2 - 1 \][/tex]

Step 1: Substitute [tex]\( x = 3 \)[/tex] into the expression.
[tex]\[ 3^2 - 1 \][/tex]

Step 2: Calculate [tex]\( 3^2 \)[/tex].
[tex]\[ 3^2 = 9 \][/tex]

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

Therefore, the value of the expression when [tex]\( x = 3 \)[/tex] is [tex]\( 8 \)[/tex].

The correct answer is:
D. 8
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