(5х+3)²=5х+325x²+30x+9=5x+3 25x²+30x+9-5x-3=025x²+15x+10x+6=05x×(5x+3)+2(5x+3)=0(5x+3)×(5x+2)=05x+3=05x+2=0x=[tex]-\frac{3}{5} \\[/tex] x= [tex]-\frac{2}{5}[/tex] x1= [tex]-\frac{3}{5}[/tex]x2= [tex]-\frac{2}{5}[/tex]
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(5х+3)²=5х+3
25x²+30x+9=5x+3
25x²+30x+9-5x-3=0
25x²+15x+10x+6=0
5x×(5x+3)+2(5x+3)=0
(5x+3)×(5x+2)=0
5x+3=0
5x+2=0
x=[tex]-\frac{3}{5} \\[/tex]
x= [tex]-\frac{2}{5}[/tex]
x1= [tex]-\frac{3}{5}[/tex]
x2= [tex]-\frac{2}{5}[/tex]