Question

Solve the inequality.

x^(3)+5x^(2)≥4x+20
Write your answer as an interval or union of intervals.

Answer 1

its a grouping factor

Answer 2

maybe

x^(3)+5x^(2)≥4x+20

Answer 3

x^3 +5x^2 -4x +20 ≥ 0

(x^3 +5x^2) + (-4x +20) ≥ 0

x^2(x +5) + -4(x-5) ≥ 0 ; almost :)

Answer 4

doh!! ... i typoed the 20 when i brought it over .... mathing and typing do not mix

Answer 5

x^3 +5x^2 -4x -20 ≥ 0

(x^3 +5x^2) + (-4x -20) ≥ 0

x^2(x +5) -4(x+5) ≥ 0

(x^2-4)(x +5) ≥ 0 ; (x^2-4) is a diff of squares

(x+2)(x-2)(x+5) ≥ 0

Answer 6

lol...my solution is x>2.....I'm lost I guess