Sagot :
Réponse :
bonjour
A = 2 - 5/3 x 1/10
A = 2 - 5/30
A = 2 - 1/6
A = 6/6 - 1/6 = 5 /6
B = 3/5 - 2/3 : 3/12
B = 3/5 - 2/3 x 12/3
B = 3/5 - 24/9
B = 27/45 - 120/45
B = - 93/45 = - 31/15
A = 9 x² - 27 x - 15 x + 45
= 9 x² - 42 x + 45
B = ( 16 x - 2 ) ( - x + 7 )
= - 16 x² + 112 x + 2 x - 14
= - 16 x² + 114 x - 14
Explications étape par étape :
Réponse :
A = 2-[tex]\frac{5}{3} *\frac{1}{10} =[/tex]
A = 2-(5/30)
A = 2 - (1/6)
A =(12-1)/6 =11/6
B = 3/5 - (2/6):(3/12)
B = 3/5 - (1/3):1/4
B = 3/5 - (1*4/3*1)
B = 3/5 - 4/3
B = (9-20)/15= -11/15
A = (3x-5)(3x+9)
A = 9x²+27x-15x-45
A = 9x²+12x-45
B = 2(8x-1)(-x+7)
B = (16x-2)(-x+7)
B = -16x²+112x+2x-14
B = -16x²+114x-14
Explications étape par étape :