Решите пожалуйста,очень срочно надо !

3. 6x^2 - 7x + 1 = 0.

D = (-7)^2 - 4*6*1 = 49-24= √25 = 5.

x1 = 7+5/12 = 1

x2 = 7-5/12 = 1/6

4.

а) x^2 - 36 = 0;

x^2 = 36

x = +-6.

б) 2x^2 = 3x

x1 = -√6/2

x2 = √6/2

5.  а) 4x^2 -x = 0

x1 = 0

x2 =1/4

б) 3x-1 = 0

x=1/3

6. (3x-1)(2x+3)=3(2x-1)

6x^2+9x-2x-3 = 6x-3

6x^2+9x-2x=6x

6x^2+7x=6x

6x^2+x=0

x+(6x+1)=0

x=0 или 6x+1=0

6x+1 = 0

6x = 1

x = 1/6.

7. 2x+3/2 - x^2+6x/6 = 1

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

6x + 9 -x^2 -6x = 6

9 - x^2 = 6

-x^2 = -3

x = +-√3

8-e не вижу, сорри :)