Люди помогите очень нужно!!! Алгебра 7 класс Разложить на множители: 3a^2-6a+3 4a^2+8a+4 18a^2+12ab+2b^2 12m^2-12m+3^2

1)137^3-37^3 дробная черта 137^2+137*37+37^2=137-37=100

2) 249^3-49^3 дробная черта 249^2+249*49+49=249-49=200

формула
(a^3-b^3)=(a-b)(a^2+ab+b^2)

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6
5. (x-2)^2(x+2)^2
6. (a^2-c^4)^2

ГОТОВО!

надо посчитать

Надо самому учить

(x^2+4)^2 - 16x^2 = [ ((x^2+4) + 4x ] * [ ((x^2+4) - 4x ] = ( x^2 + 4x +4 ) * ( x^2 - 4x +4 ) = ( x + 2):^2 * (x - 2)^2 = [ (x +2)*(x-2) ]^2 = (x^2 - 4)^2

3a^2-6a+3 = 3(a^2-2a+1) = 3(x-1)^2

(a^2+c^4)^2-4a^2c^4 = ( a^2 + c^4 +2ac^2) * ( a^2 + c^4 -2ac^2) = (a + с^2)^2 * (a - с^2)^2 = (a^2 - с^4)^2

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6

привет. вот решение 1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6

-

и вдруг учитель видит и ставит ему 2)))

5. (x-2)^2(x+2)^2
6. (a^2-c^4)^2

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6
5. (x-2)^2(x+2)^2
6. (a^2-c^4)^2

I had finished my work before he returned.
After the sun had set, we decided to return home.
We had reached the station when the rain started.
He thanked me for what I had done for him.
The manager had not left the office before I arrived.
We had written the article by five o'clock.
By the end of the year she had learnt to speak English.

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6

решить это можно было быстрей, чем тут запостить, малыш)

off

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6
5. (x-2)^2(x+2)^2
6. (a^2-c^4)^2

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6

1)3(a-1)^2
2)4(a+1)^2
3)2(3a+1)^2
4)3(2m-1)^2+6