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 :)