Reviewer in Mathematics Grade nine 9.pptx

2. Example 𝑥2 − 49 = 0 𝑥2 = 49 √ 𝑥2 = 49 x = + 7 and - 7

3. 𝑥 = −𝑏 ± 𝑏2 − 4𝑎𝑐 2𝑎

4. 16𝑥2 − 8𝑥 + 1 = 0 DISCRIMINANT FORMULA D = 𝑏2 − 4ac 𝑎 = 16 𝑏 = −8 𝑐 = 1 D = 𝑏2 − 4ac 𝐷 =(−8)2 −4(16)(1) 𝐷 = 64 −4(16) 𝐷 = −64 𝐷 = 0 64

5. 𝟐𝒙𝟐 − 𝟒𝒙 − 𝟏 = 𝟎 𝑎 = 2 𝑏 = −4 𝑐 = −1 𝒓1 + 𝒓2 = −𝒃 𝒂 = −(−𝟒) 2 = 2 𝒓1𝒓2 = 𝒄 𝒂 = (−𝟏) 2 = − 𝟏 2

6. b. 𝟓, −𝟑 5 − 3 = 5 𝑟2 = −3 𝒙2 − 𝒓1 + 𝒓2 𝒙 + 𝒓1𝒓2 𝒙2 − 𝒃𝒙 + 𝑐 𝑥2 − 𝑟1 𝑥 + 5)(−3 𝑥2 − 2 𝑥 + (−15) 𝑥2 − 2x−15 = 0

7. Solving problems involving quadratic equation

8. IDENTIFYING QUADRATIC EQUATION OR NOT.

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