(5a+1)(2a-3)-(10a-3)(a+1)=0

Question

(5a+1)(2a-3)-(10a-3)(a+1)=0

Answer 1

10a+2a-15a-3-(10a^2-3a+10a-3)=0
10a+2a-15a-3-10a^2+3a-10a+3=0
-10a^2-10a=0
a(-10a-10)=0
a=0 или -10а-10=0
-10а=10 |÷(-10)
а=-1
ответ: -1; 0