List of primary or secondary sources:

1. Primary sources:

- Original documents (letters, diaries, speeches, manuscripts)
- Autobiographies and memoirs
- Interviews and oral histories
- Historical photographs and audio/video recordings
- Official records and government documents
- Archaeological artifacts
- Scientific research papers (including lab reports and experiments)
- Survey responses and questionnaires

2. Secondary sources:
- Textbooks
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- Scholarly articles and peer-reviewed journals
- Biographies and other historical books
- Newspaper and magazine articles
- Documentary films
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- Online encyclopedias and reference works (such as Wikipedia, although this may also include primary sources)

4x^2 + 7x - 2 = 0

Find the solutions of each quadratic by factoring.

To find the solutions of the quadratic equation 4x^2 + 7x - 2 = 0 by factoring, we need to factor the quadratic expression on the left side and solve for x.

The quadratic factors to: (4x - 1)(x + 2) = 0

To find the solutions, we set each factor equal to zero and solve for x:

1st factor: 4x - 1 = 0
Add 1 to both sides: 4x = 1
Divide both sides by 4: x = 1/4

2nd factor: x + 2 = 0
Subtract 2 from both sides: x = -2

Therefore, the solutions of the quadratic equation 4x^2 + 7x - 2 = 0 by factoring are x = 1/4 and x = -2.