Pour les exercices 59 et 60, résoudre chaque équation. 59) a. (2x+7)(3x-12)=0 b. (5t-2)(6t+9)=0 69) a. 3y(4y-5)=0 b. (3-2x)(x+4)=0 Vous pouvez m'aider s'il vou

59) a. (2x+7)(3x-12)=0 

2x+7 = 0                                     3x-12 =0

2x =-7                                          3x =12

x = -7/2                                          x =12/3 =4

 b. (5t-2)(6t+9)=0

5t-2 =0                          6t+9 =0

5t = 2                                6t = -9

t = -2/5                                t = -9/6 = -3/2

 69)

a. 3y(4y-5)=0

3y =0                         4y-5 =0

y =0/3                         4y =5

y =0                              y = 5/4

 b. (3-2x)(x+4)=0

3-2x= 0                             x+4 =0

-2x = -3                              x = -4

x = -3/-2

x= 3/2