a ( 6a +1 ) = 2a (2 - 2,5a)
6a^2+a=4a-5a^2;
a^2=4a-a;
a^2=a(4-1);
a=3.
a (6a +1) = 2a ( 2- 2, 5 a )
6a^2 + a = 4a - 5 a^2
6 a ^2 + 5 a ^ 2 +a-4a = 0
11 a ^2 - 3a = 0
a (11a - 3 ) =0
a = 0 или 11a- 3 = 0
11a = 3
a = 3/ 11
ответ : 0 и 3/ 11
a ( 6a +1 ) = 2a (2 - 2,5a)
6a^2+a=4a-5a^2;
a^2=4a-a;
a^2=a(4-1);
a=3.
a (6a +1) = 2a ( 2- 2, 5 a )
6a^2 + a = 4a - 5 a^2
6 a ^2 + 5 a ^ 2 +a-4a = 0
11 a ^2 - 3a = 0
a (11a - 3 ) =0
a = 0 или 11a- 3 = 0
11a = 3
a = 3/ 11
ответ : 0 и 3/ 11