Dr. Huebner provides vaccinations against measles and polio. Each polio vaccination consist of 4 doses,
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1. Each term in this polynomial has a common factor of :
2. Not sure what the "vertical method" is, but I would guess it refers to some way of visualizing the distributive property.
3. You can use the same approach as in (2), or recall that :
4. Recall that a difference of squares can be factored as . So