Maths Puzzle

12345678
Across
  1. 3. Polynomial is the polynomial of degree zero.
  2. 4. an equaton equal to zero.
  3. 7. line which overlaps the other line.
  4. 8. Polynomial is of degree 1.
Down
  1. 1. then it is a unique solution.
  2. 2. ___________=Quatient*divisor+remainder.
  3. 4. _____________ ,substitution and Cross multiplication.
  4. 5. The curve obtained in a graph.
  5. 6. The exponent of the highest degree term in a polynomial