Crossword

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Across
  1. 3. the space in a figure(in m²)
  2. 5. a synonym of standard form
  3. 7. 2 is an ? but 2.43653 is not an ?
Down
  1. 1. a(x-alpha)²+B is the ? form
  2. 2. 2,4,6,88,16,2532 are ? numbers
  3. 4. y=3x+69 y is expressed in ?of x
  4. 6. the discriminant is ? when there are 2 real roots