Sagot :
bonjour
N = - x² + 49 = - ( x - 7 ) ( x + 7 )
O = 144t ² - 25 = ( 12 t - 5 ) ( 12 t + 5 )
P = 81 - 4 t² = ( 9 - 2 t ) ( 9 + 2 t )
Q = 121 z² - 144 = ( 11 z - 12 ) ( 11 z + 12 )
R = 64 y² - 9 t² = ( 8 y - 3 t ) ( 8 y + 3 t )
bonjour
N = - x² + 49 = - ( x - 7 ) ( x + 7 )
O = 144t ² - 25 = ( 12 t - 5 ) ( 12 t + 5 )
P = 81 - 4 t² = ( 9 - 2 t ) ( 9 + 2 t )
Q = 121 z² - 144 = ( 11 z - 12 ) ( 11 z + 12 )
R = 64 y² - 9 t² = ( 8 y - 3 t ) ( 8 y + 3 t )