Finding zeros of a quadratic function
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The document provides examples of finding the zeros of quadratic functions by factorizing and setting each factor equal to 0. It then lists 5 additional quadratic functions and assigns the reader to find their zeros.
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Finding zeros of a quadratic function
- 5. f(x) = x2+3x+2 x2+3x+2 = 0 (x+2) (x+1) = 0 x+2=0 x+1=0 x= -2 x= -1 Therefore, the zeros are -2 and -1
- 8. f(x) = x2-5x+6 x2-5x+6 = 0 (x-3) (x-2) = 0 x-3 =0 x-2=0 x= 3 x= 2 Therefore, the zeros are 3 and 2
- 11. f(x) = x2-2x-3 x2-2x-3 = 0 (x-3) (x+1) = 0 x-3 =0 x+1=0 x= 3 x= -1 Therefore, the solutions are 3 and -1
- 13. Find the zeros of the ff. Quadratic Functions. 1. F(x) = x2 - 5x – 24 2. F(x) = x2 – 2x -8 3. F(x) = x2 + x – 2 4. F(x) = 3x2 + 9x – 12 5. F(x) = 2x2 + 15x - 8
- 14. Assignment: Find the zeros of the ff. Quadratic Functions. 1. F(x) = x2 – 3x - 4 2. F(x) = x2 +5x - 6 3. F(x) = 6x2 -9x - 15 4. F(x) = x2 - 100 5. F(x) = 81x2 – 90x + 25