Question

Помогите, плиз 1) 6x²-11x+3=0. 2)7x²+5x=0

Answer 1

6x^2 - 11x + 3 = 0
D = 121 - 12*6 = 49
x1 = (11 + 7)/12 = 18/12 = 3/2 = 1,5
x2 = (11 -  7)/12 = 4/12 = 1/3

7x^2 + 5x = 0 
x (7x + 5) = 0

x = 0 ;

7x + 5 = 0 
7x = - 5
x = - 5/7