Question

True or false, x =4 is a critical point to this inequality

x²-4 / x²+9x+20 is greater than/equal to 0

Answer 1

true

Explanation:

x²-4/x²+9x+20 >=0

cross multiplying the equation we have,

(x²-4/x²+9x+20)*x²+9x+20 >= 0*x²+9x+20

= x²-4>=0

x²>=4

taking the square root of both sides, we have:

√x²>= √4

x >=2