👤

Sagot :

bonsoir

A) 10x -(1-2x)=-1

10x - 1 + 2x = -1

12x = -1 + 1

12x = 0

x = 0

b) (x-7)(x+4)= 0

x - 7 = 0 ou x + 4 = 0

x = 7 ou x = -4

c) (2x + 1)(9x -18) = 0

2x + 1 = 0 ou 9x - 18 = 0

2x = -1 ou 9x = 18

x = -1/2 ou x = 18/9

x = -1/2 ou x = 2

d) - 2x(x + 5) = 0

-2x = 0 ou x + 5 = 0

x = 0 ou x = -5

e) (2x + 3)^2 = 0

2x + 3 = 0

2x = -3

x = -3/2

© 2024 IDNLearn. All rights reserved.