Réponses

2013-02-02T12:46:41+01:00

exercice 7

 

a)

 

(5-t)²

(-t)²+2*(-t)*5+5²

t²-10t+25

 

c)

 

(4y-1)²

(4y)²+2*4y*(-1)-1²

16y²-8y+1

 

d) 

 

(3x-7)²

(3x)²+2*3x*(-7)-7²

9x²-42x+49

 

 

 

2013-02-02T12:48:57+01:00
A) (5-i)^2=25 -10i +i^2 C) (4y-1)^2=16y^2 -8y +1 D) (3x-7)^2= 9x^2 -42x +49 H) (1,4x-1)^2= 1,96x^2 -2,8x +1