( 2 х + 3 ) ( х - 2 ) - 14 > = х^2

Question

( 2 х + 3 ) ( х - 2 ) - 14 > = х^2

Answer 1

X^2 - x - 20 ≥ 0 

x^2 - x - 20 = 0 
D = 1 + 4*20 = 81
x1 = ( 1 + 9)/2= 5
x2 = ( 1 - 9)/2= - 4

x ∈ ( - ∞; - 4 ] ∪ [ 5 ; + ∞)