Question

1. Tìm x:

a) -3.(x-5)+2.(x+3)=-4

b) (x+5).(x-9)=0

c) (-7+x).(5-x)=0

Answer 1

09093 mắt 3 mắt 3 con mắt

Answer 2

b,(x+5)(x-9)=0

=>x+5=0

x=0-5

x=-5

=>x-9=0

x=0+9

x=9

Vay :x=-5 hoặc 9

c,(-7+x)(5-x)=0

=>-7+x=0

x=0-(-7)

x=7

=>5-x=0

x=5-0

x=5 

Vay :x=7 hoac 5 

a, -3.(x-5)+2.(x+3)=-4

3x-5+2x+3=-4

3x-2x+5+3=-4

x(3-2)+5+3=-4

x.1+8=-4

x.1=-4-8

x.1=-12

x=-12:1

x=-12

Vay x=-12

 

Answer 3

dong gop ti nha!

a/ x = 1 thao a

nho tick cho to !