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Start with the given equation

Factor out the GCF
Now set each factor equal to zero:

or
Now solve for x for each factor:

or

note: since the left term is squared, this means the zero occurs twice.
So the zeros of

are:

(with a multiplicity of 2) and
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Is it supposed to read:

?

Start with the given equation

Factor out the GCF
Now set each factor equal to zero:

or
Now solve for x for each factor:

or
So the zeros of

are:

or