Question

cuanto da 5x^2-3x-1=0

Answer 1

(3x - 1)^2 - 5(x-2) - (2x + 3)^2 - (5x + 2)(x - 1) = 0 
(9x^2 - 6x + 1) - 5x + 10 - (4x^2 + 12x + 9) - (5x^2 - 5x + 2x - 2) = 0 
9x^2 - 6x + 1 - 5x + 10 - 4x^2 - 12x - 9 - 5x^2 + 5x - 2x + 2 = 0 
9x^2 - 4x^2 - 5x^2 - 6x - 5x - 12x + 5x - 2x + 1 + 10 - 9 + 2 = 0 
0x^2 - 20x + 4 = 0 
-20x = - 4 
x = - 4 / - 20 
x = 1 / 5