Question

If x - 4 = 9, what is the value of x² - 4?
(A) 21
(B) 77
(C) 81
(D) 165
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Answer 1

Answer:

The value of x^2-4x

2

−4 is 165

Step-by-step explanation:

Given :x-4=9x−4=9

To Find :x^2-4x

2

−4

Solution :

x-4=9x−4=9

x=9+4x=9+4

x=13x=13

Now substitute the value of x in x^2-4x

2

−4

\begin{gathered}=13^2-4\\=169-4\\=165\end{gathered}

=13

2

−4

=169−4

=165

Hence the value of x^2-4x

2

−4 is 165

Answer 2

Answer:

Given that,

x - 4 = 9

x= 9 +4

x = 13

So, x^2 = 13 × 13 = 169

x^2 - 4 = 169 - 4 = 165

So, 165 is the correct option

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