Question

Cum pot rezolva ecuatia: 2x(x+1)+5x(2x+3)=2x(5x+9)???
Solutii va rog!

Answer 1

2x(x+1)+5x(2x+3)=2x(5x+9)   |:2x

(x+1)+5x*2x+15x=5x+9   |:5x

(x+1)+2x+15x=5x:5x+9

5x impartit la 5x da 1 .

18x+1=1+9  |-1

18x=9  |:18

x=9:18

x=0,5.

S={0,5}

Answer 2

2*(x+1)+5*(2x+3)=2*(5x+9)
2x+2+10x+15=10x+18
12x+17=10x+18
2x=1
x=0.5 
Faci tu verificarea ... (lol , sa stii ca e corect )