Bonjour svp aidez moi a ces 3 6 et 7exos en math svppp

n) 6

a = 5 x² + 3 x

b = 8 y² + 5 y

c = 3 t² - 7 t

d = 25 z² - 20 z

n°7

a = x² - 4 x + x² = - 4 x

b= 2 x² + 10 x - x = 2 x² + 9 x

c = x² + 2 x + x  +2 =  x² + 3 x +2

d = x² - x + 5x - 5 = x² + 4x - 5

e = 6 x² + 2 x + 3 x + 1 = 6 x² + 5 x +1

f = x² - 4 x - 3 x + 12 = x² - 7 x + 12

N° 2

a ) 7 x + 63

b = 9 y - 27 

c = - 3z + 15

d = 12 + 20 x

e = 54 y - 48
f = - 25 + 35 z