Non-linear inequalities (one variable)

Which of the following does not belong to the group?

• x² - 3x + 4 > 0

• 2x² > 4

• x² + 6x < 3

• x³ + 4x + 8 < 0

Which of the following is an example of quadratic inequality?

• 2x² + 3x + 4 > 0

• 15x ≤ 10

• x² - x +15 < -30

• x² + 4x - 5 = 0

 $x^2-9x-112≥0$  

•  $-7<x<16$  

•  $-7≤x≤16$  

•  $x<-7\ \ or\ \ x>16$  

•  $x≤-7\ \ or\ \ x≥16$  

Solve the quadratic inequality: -x^2 + 4x - 3 < 0

• x < 1 or x > 3

• x > 1 and x < 3

• x < 1 and x > 3

• x > 1 or x < 3

(m + 5)(m - 3) < 1, is

• Quadratic Inequality

• Not Quadratic Inequality

Which of the following is the solution of the given Quadratic Inequality?

• b ≥ -2 or b ≤ -1

• b ≤ -2 or b ≥ -1

• b ≥ 2 or b ≤ 1

• b ≤ 2 or b ≥ 1