Bonjour,
3,1415926535 (=pi)
(44 -4 )/2 => 20mn
P1:
x
-2x
4x²
4x²+2x
4x² +2x+5
P2:
2x
2x-3
(2x-3)² = 4x² -12x +9
4x² +2x+5 = 4x² -12x +9
4x² +2x -4x² +12x = 9 -5
14x = 4
x= 4/14 = 2/7