bonsoir
1) 6 - 4 ( x - 2)= 6 - 4 x + 8 = - 4 x + 14
2) 100 x² - 25 = ( 10 x - 5) ( 10 x + 5)
3) 5 x² + 2 x - 3 = 5*4 + 2 ( - 2) - 3 = 20 -4 - 3 = 13
4) ( x - 1)² = x² - 2 x + 1
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bonsoir
1) 6 - 4 ( x - 2)= 6 - 4 x + 8 = - 4 x + 14
2) 100 x² - 25 = ( 10 x - 5) ( 10 x + 5)
3) 5 x² + 2 x - 3 = 5*4 + 2 ( - 2) - 3 = 20 -4 - 3 = 13
4) ( x - 1)² = x² - 2 x + 1