Résoudre les équations: a)3(x+2)+(x-2)=0 b)(x+1)(5+2x)=2xaucarré-3 c)3(2-3x)-(4+5x)=0 d)3(x+4)=4(-8+x)

a)3(x+2)+(x-2)=0
3x+6+x-2 =0
4x = -6+2   =>   x =-4/4         =>  x = - 1

b)  (x+1)(5+2x)=2x²- 3
2x²+7x+5 = 2x²- 3
2x²+7x+5 -2x²+3 =0
7x = - 8
x = - 8/7

c)  3(2-3x)-(4+5x)=0
6- 9x -4 - 5x =0
-14x = 4-6 =-2
x = 2/14
x = 1/7

d)  3(x+4)=4(-8+x)

3x +12 = -32 +4x
3x-4x = -32-12
-x = -44
x = 44

3(x + 2)+(x-2) = 0
3x +6 +x-2 
3x +x = -6 +2                                                                                                 4x = -6+2  
4x = -4
x = -4/4 = -1

(x+1)(5+2x) = 2x² -3
+5x +2x² +5 +2x = 2x² -3
2x² +7x +5 -2x² -3 = 0
2x²+7x+5 = 2x²- 3
2x²+7x+5 -2x²+3 =0
7x = - 8
x = -8/7

3(2-3x)-(4+5x) = 0
6- 9x -4 - 5x = 0
-14x = -2
x = 2/14 = 1/7

3(x+4)= 4 (-8+x)
3x +12 = -32 +4x
3x-4x = -32-12
-x = -44
x = 44