Bonjour,
Factoriser:
A= 6(x²-49)= 6(x-7)(x+7)
B= 1/4 x²-1= 1/4(x-2)(x+2)
C= (5+4x)(6-7x)+(5+4x)= (5+4x)(6-7x+1)= (5+4x)(-7x+7)= -7(4x+5))(x-1)
D= √x(x+4)+√x(3x+9)= √x(x+4+3x+9)= √x(4x+13)
E= 8x²y-4y²x+6xy= 2xy(4x-2y+3)
Explications étape par étape:
A= 6(x² -49)
A= 6 ×(x -7)(x +7)
B= 1/4x² - 1
B= 1/4(x² -4)
B= 1/4 × (x -2)(x +2)
C= (5 +4x)(6 -7x)+(5 +4x)
C= (5 +4x)(6 -7x +1)
C= (5 +4x)(7 -7x)
C= (5 +4x) ×7(1 -x)
C= 7(5 +4x)×(1-x)
D= √x (x +4) + √x (3x +9)
D= √x (x +4 +3x +9)
D= √x (4x +13)
E= 8x²y - 4y²x + 6xy
E= 2xy × 4x - 2xy × 2y + 2xy × 3
E= 2xy ×(4x -2y +3)
