Polynomial crossword puzzle

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Across
  1. 3. a zero of polynomial 2x^2-5x+3
  2. 4. a polynomial can't have more than one zeros
  3. 6. which can have at most two terms
  4. 8. is 2x+5 a polynomial
Down
  1. 1. equation type of x^2+3x+4
  2. 2. points (x + 1)(x + 3)x intersects with x-axis
  3. 3. degree of polynomial 2x+4
  4. 5. The graph of a quadratic polynomial
  5. 7. The degree of a constant polynomial is
  6. 8. The degree of polynomial x^5− x^4 + 7 is