Sagot :
Réponse:
3x+2/3-5/2=-2/5x-3
3x+2/3+2/5x=5/2-3
15x+10+6+5x/15=5/2-6/2
20x+16/15=-1/2
2(20x+16)=-15
40x=-15-32
40x=-47
X=-47/40
3-2x/4+3/10=x-3/5-7/2
15-10x-3x+9/20=-3-6/10
24-14x/20=-9/10
240-140x=-180
-140x=-180-240
-140x=-420
X=42/14
X=21/7
(2x-1)(3x+1)=0
2x-1=0 3x+1=0
2x=1. 3x=-1
X=1/2. X=1/3
(x-2)(2x+4)=0
X-2=0. 2x+4=0
X=2. 2x=-4
X=-4/2
(3-2x)x=0
-2x=-3. X=0
X=3/2
(5x+1)(5+x)=0
5x=-1. X=-5
X=-1/5
(3x+1)(x-1)-(x-1)2=0
(x-1)(3x+1-x+1)=0
(x-1)(2x+2)=0
X=1. 2x=-2
X=-1
(2x-1)2=(2x-1)(4x+7)=0
(2x-1)2-(2x-1)(4x+7)=0
(2x-1)(2x-1-4x-7)=0
(2x-1)(-2x-8)=0
2x=1. -2x=8
X=1/2. X=-4