Sagot :
Réponse :
Bonjour
Explications étape par étape
Factoriser :
A= 15+5x = 5 (3 +x) à corriger
B = -3x+x² = x(-3+x)
C = -6x²y-3xy = 3 xy (2x-1)
D= x²+6x+9 = (x +3)²
E= y²-10y +25= (y -5)²
F= t²-1 = (t -1)(t +1)
H = (x+1)² - (x+7) = (x+1)( -x -7)
I = 5x²-20= 5(x²-4)
J= x²-4 + (x-2) (2x+1) =
J = (x -2)( x+2) + (x-2) (2x+1)
J = (x-2)( x +2+2x +1)
J = (x -2)( 3x +3)
bonjour
A= 15+5 x
= 5 (3 + x)
B = -3 x+x²
= x (-3 + x)
C = - 6x²y -3 xy
= 3 xy ( - 2 x- 1 )
D= x²+6x+9 = (x +3)² = identité remarquable
E= y²-10y +25= (y -5)² idem
F= t²-1 = (t -1)(t +1) idem
H = (x+1)² - (x+7)
= ( x + 1 ) ( x + 1 - x - 7 )
= - 6 ( x + 1 )
I = 5 x²- 20 = 5 (x²- 4 )
J= x²-4 + (x-2) (2x+1)
= ( x - 2 ) ( x + 2 ) + ( x + 2 ) ( 2 x + 1 )
= ( x + 2 ) ( x - 2 + 2 x + 1 )
= ( x + 2 ) ( 3 x - 1 )