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Question

solve by factorisation

1) 9x2 - 15x + 6

2) 4x2 + 3x + 5

3) 5x2 - 6x - 2

4) 2x2 - 5x + 3

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Solution

1. 9x2 - 15x + 6=9x2 - 9x - 6x + 6=9xx-1 - 6x-1=9x-6x-1=33x-2x-14. 2x2-5x+3=2x2-2x-3x+3=2xx-1-3x-1=2x-3x-1

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