Je suppose qu'il faut faire le 6 et le 7 qui sont cochés Exo 6 a = (4x-5)² b= (t+3-5t)(t+3+5t) = ( -4t +3)(6t +3) c = (a - a +5/4)² d = (5x+4)(5x+4 -3) = (5x +4 )( 5x +1)
Exo 7
a = 18a-3a² +30 -5a a = -3a² + 13a +30 b = 2y² +18y - (20 -8y) b = 2y² +18y -20 +8y b = 2y² +26y -20 c = 9x² +24x +16 - ( 6x -15) c = 9x² +24x +16 -6x +15 c = 9x² + 18x +31
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BonsoirJe suppose qu'il faut faire le 6 et le 7 qui sont cochés
Exo 6
a = (4x-5)²
b= (t+3-5t)(t+3+5t) = ( -4t +3)(6t +3)
c = (a - a +5/4)²
d = (5x+4)(5x+4 -3) = (5x +4 )( 5x +1)
Exo 7
a = 18a-3a² +30 -5a
a = -3a² + 13a +30
b = 2y² +18y - (20 -8y)
b = 2y² +18y -20 +8y
b = 2y² +26y -20
c = 9x² +24x +16 - ( 6x -15)
c = 9x² +24x +16 -6x +15
c = 9x² + 18x +31
d = (2y/4 - 4/4)²
d = (2y -4)²
d = 4y² - 16y +16