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- 1. Quadratic Equations (Quadratic Formula) by Rich Rollo
- 2. The Equation 5y 2 –8y + 3 = 0
- 3. The Quadratic Formula x = -b + b 2 –4ac 2a
- 4. Identify the Parts ay 2 + by + c = 0 5y 2 –8y + 3 = 0 Therefore in this case, a = 5, b = -8, and c = 3.
- 5. Step One Plug in the values of a, b, and c into the quadratic formula. x = -(-8) + (-8) 2 –4(5)(3) 2(5)
- 6. Step Two Simplify all terms found within the radicand. x = -(-8) + 64 –60 2(5) x = -(-8) + 4 2(5)
- 7. Step 3 Simplify the remaining terms in the formula. x = -(-8) + 4 2(5) x = 8 + 2 10
- 8. Step 4 Isolate the variable to find the solution set. x = 8 + 2 10 X = 8 + 2 X = 8 –2 10 10 = = 1 .6 &
- 9. Solution Set 1 and .6
- 10. Check the 1 st Solution Check ………………………………………… 1 5y 2 –8y + 3 = 0 5(1) 2 –8(1) + 3 = 0 5 –8 + 3 = 0 True
- 11. Check the 2 nd Solution Check ………………………………six-tenths. (.6) 5y 2 –8y + 3 = 0 5(.6) 2 –8(.6) + 3 = 0 1.8 –4.8 + 3 = 0 True
- 12. Therefore 1 and .6 is the solution set for 5y 2 –8y + 3 = 0

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