Réponse :
bonjour
A = (2x + 3)²
A = 4 x² + 12 x + 9
B = (4x-1)² = 16 x² - 8 x + 1
2) Factoriser les expressions suivantes :
E = 4x²-12x+9
E = ( 2 x - 3 )²
H = (2x-1)²-9 = ( 2 x - 1 - 3 ) ( 2 x - 1 + 3) = ( 2 x - 4 ) ( 2 x + 2 )
K = 4x²-8x = 4 x ( x - 2 )
Exencias
C = (4x-1)(4x+1) = 16 x² - 1
F=x²-10x+25 = ( x - 5 )²
I= (3x-2)²-49 = ( 3 x - 2 - 7 ) ( 3 x - 2 + 7 ) = ( 3 x - 9 ) ( 3 x + 5 )
L = 9xy + 3ax = 3 x ( 3 y + a )
D=(5x-7)² = 25 x² - 70 x + 49
G= 36x²-9 = ( 6 x - 3 ) ( 6 x + 3 )
J= 4x² +25+20x = ( 2 x + 5 )²
M=(x-3)²-(3x-5)² = ( x - 3 + 3 x - 5 ) ( x - 3 - 3 x + 5 ) = ( 4 x - 8 ) ( - 2 x + 2 )
Explications étape par étape :
