Answer:
Step-by-step explanation:
The correct answer is

In fact, this is a trinomial of the form

, whose solutions are given by

Using this formula for the trinomial of the problem, we find:

<span>we see that this trinomial has two coincident solutions (x=3 with multiplicity 2). This means that it can be rewritten as a perfect square, in the following form:
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Move all terms to the left side and set equal to zero. then set each factor equal to zero .
x = - 6 - y
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4 + r