Question

Rozwiąż nierówność

A)3x^2+5x-2>= 0

B)-x^2+3>0

C)x^2-24x+144<=0

Answer 1

 a )

 

Delta = 5^2 - 4 * (-3) * (-2) = 25 - 24 = 1

 

x1 = -5 -1 / 2* (-3) = -6 / -6 = 1

x2 = -5 + 1 / 2* (-3) = -4 / -6 = 2/3