Ej's crossword

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Across
  1. 2. x = −b ± √b²-4ac/2a
  2. 7. (x₁+x₂) / 2, (y₁+y₂) / 2
  3. 8. d=√(x₁ – x₂)² + (y₁ – y₂)²
Down
  1. 1. a²+b²=c²
  2. 3. is the branch of mathematics that deals with the study of numbers using various operations on them.
  3. 4. is the rotation or movement of an object that's the opposite direction of the hands movement on a clock.
  4. 5. y=mx+b
  5. 6. Slope = y₂ – y₁ / x₂ – x₁