Question

TÌM X SỐ TỰ NHIÊN 

 5x(X-100)=0

34x (2X -6)= 0

3x(X+7)-15 =27

24+3x(5-X)

X x ( x+10 = 2+4+6+....+2500

 

Answer 1

a. 5x(x-100)=0

=> TH1 : 5x=0 => x= 0

TH2 : x-100 = 0 => x= 100

Vậy .......

b. 34x (2x-6) =0

TH1: 34x=0 => x= 0

TH2; 2x-6=0 => 2x= 6 => x = 3

Vậy ............

Answer 2

a,5x(x-100)=0

=> 5x=0 hoac x-100=0

=> x=0 hoac x=100

b,34x(2x-6)=0

=> 34x=0 hoac 2x-6=0

=>x=0 hoac x=3

c,3x(x+7)-15=27

phan nay nhieu truong hop lam ban dong nao nha goi y

3x=6hoac21

x+7=7hoac 2

va co 4truong hop

phan con lai ko ro ban viet lai di

Answer 3

\(5.\left(x-100\right)=0\)

\(x-100=0\)

\(x=100\)

vay \(x=100\)

\(34.\left(2x-6\right)=0\)

\(2x-6=0\)

\(2x=6\)

\(x=3\)

vay \(x=3\)

\(3.\left(x+7\right)-15=27\)

\(3\left(x+7\right)=42\)

\(x+7=14\)

\(x=7\)

vay \(x=7\)

\(24+3.\left(5-x\right)=0\)

\(24+15-3x=0\)

\(39-3x=0\)

\(3x=39\)

\(x=13\)

vay \(x=13\)