Activity 9: Finding a, b, and el Find the values of a, b, and cof the following quadratic equations. Write your answers on the blanks provided. 1. 2x. -14% -21 2. 2x. 5x + 20 - 3x b= 3. X(2x - 6) = 15 a 4. (x + 1)(x-4) = 1 a 5. (x - 8XX + 4) = 61X - 2) 6, 3x + 7x = x + 2x - 7 7. (y + 2)² = 2(3-4) 8. (r + 2) + 5) = (2x - 1)(+6) 6x 1 9. x 3 3 2. 10. x2 + 4 3 b



guys help me pls​