bonsoir
A ) ( 2 + 2 x ) /4 = ( 1 + 2 x) / 2
4 + 4 x = 4 + 8 x
4 x - 8 x = 4 - 4
- 4 x = 0
x = 0
B ) x² - 6 x + 9 - ( x - 3 )
x² - 6 x + 9 - x + 3
= x² - 7 x + 12
C = 4 x² - 9 ( x + 1 )²
= 4 x² - 9 ( x² + 2 x + 1 )
= 4 x² - 9 x² - 18 x - 9
= - 5 x² - 18 x - 9
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bonsoir
A ) ( 2 + 2 x ) /4 = ( 1 + 2 x) / 2
4 + 4 x = 4 + 8 x
4 x - 8 x = 4 - 4
- 4 x = 0
x = 0
B ) x² - 6 x + 9 - ( x - 3 )
x² - 6 x + 9 - x + 3
= x² - 7 x + 12
C = 4 x² - 9 ( x + 1 )²
= 4 x² - 9 ( x² + 2 x + 1 )
= 4 x² - 9 x² - 18 x - 9
= - 5 x² - 18 x - 9