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Check Your Understanding - Question 1 of 4

Evaluate [tex]\frac{(x+3)(x-1)}{(x-5)}[/tex] for [tex]x=9[/tex].

A. 2
B. 24
C. 3
D. 96


Sagot :

Let's solve the expression step-by-step for [tex]\( x = 9 \)[/tex]:

First, substitute [tex]\( x = 9 \)[/tex] into the expression [tex]\(\frac{(x+3)(x-1)}{(x-5)}\)[/tex]:

1. Calculate the value of [tex]\( x + 3 \)[/tex] :
[tex]\[ x + 3 = 9 + 3 = 12 \][/tex]

2. Calculate the value of [tex]\( x - 1 \)[/tex] :
[tex]\[ x - 1 = 9 - 1 = 8 \][/tex]

3. Calculate the value of [tex]\( x - 5 \)[/tex] :
[tex]\[ x - 5 = 9 - 5 = 4 \][/tex]

Now, substitute these values back into the expression:

4. Calculate the numerator [tex]\((x+3)(x-1) : \[ (x + 3)(x - 1) = 12 \times 8 = 96 \] 5. Calculate the denominator \((x-5) : \[ (x-5) = 4 \] 6. Divide the numerator by the denominator to find the result: \[ \frac{(x+3)(x-1)}{(x-5)} = \frac{96}{4} = 24 \] So, the value of the expression \(\frac{(x+3)(x-1)}{(x-5)}\)[/tex] for [tex]\( x=9 \)[/tex] is [tex]\(\boxed{24}\)[/tex].