Sagot :
Réponse :
bonjour
Explications étape par étape
14x²+7x
14x²=7x*2x
7x=7x*1
14x²+7x=(7x*2x)+(7x*1)
14x²+7x=7x(2x+1)
(x+1)(3x+1)-(x+1)(-2x+4)
(x+1)[( 3x+1)-(-2x+4)]
(x+1)(3x+1+2x-4)
(x+1)(5x-3)
16x²-25
16x²=(4x)²
25=5²
16x²-25=(4x)²-5²
(4x+5)(4x-5)
(3x-1)²-x²=(3x-1+x)(3x-1-x)
(4x-1)(2x-1)
(3x+4)²+(3x+4)(-5x+7)
(3x+4)[(3x+4)+(-5x+7)]
(3x+4)(3x+4-5x+7)
(3x+4)(11-2x)
Bonsoir,
A = 14x² + 7x
A = 7x × 2x + 7x × 1
A = 7x(2x + 1)
B = (x + 1)(3x + 1) - (x + 1)(-2x + 4)
B = (x + 1)[(3x + 1) - (-2x + 4)]
B = (x + 1)(3x + 1 + 2x - 4)
B = (x + 1)(5x - 3)
C = 16x² - 25
C = (4x²) - 5²
C = (4x - 5)(4x + 5)
D = (3x - 1)² - x²
D = [(3x - 1) - x][(3x - 1) + x]
D = (3x - 1 - x)(3x - 1 + x)
D = (2x - 1)(4x - 1)
E = (3x + 4)² + (3x + 4)(-5x + 7)
E = (3x + 4)(3x + 4) + (3x + 4)(-5x + 7)
E = (3x + 4)[(3x + 4) + (-5x + 7)]
E = (3x + 4)(3x + 4 - 5x + 7)
E = (3x + 4)(-2x + 11)