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bryan9892
10.03.2020 •
Mathematics
When factored completely, x 3 − 9 x is equivalent to —
A. x( x + 3)( x − 3).
B. x( x + 3).
C. ( x + 3)( x − 3).
D. x( x − 3).
Solved
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Ответ:
Solution:
Given expression:
To find the equivalent expression for the given expression.
Take the common term x outside.
9 can be written as 3 × 3 = 3²
Using the algebraic identity:![a^2-b^2=(a+b)(a-b)](/tpl/images/0541/0549/2fa7a.png)
Hence
is equivalent to the expression x(x + 3)(x – 3).
Option A is the correct answer.
Ответ:
a
Step-by-step explanation: