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1. If the result obtained by multiplying a number x by a number 1 less itself is 4 less than multiplying x by itself, then x =?
- A. 4
- B. 4
- C. 4
- D. 4
Answer: Option A
Explanation:
The given information can be represented as:
X * (X - 1) = X^2 - 4
Now, since it is mentioned that the result obtained by multiplying X by a number 1 less than itself is 4 less than multiplying X by itself,
we can set up the equation:
X * (X - 1) = X * X - 4
or, X^2 - X = X^2 - 4
or, -X = -4
So, X = 4
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