SOLUTION: This question deals with Quadratic Inequalities and rational inequalities. The question reads: x^2+4x>21. 4x and 21 do not evenly distribute so unsure how to solve this.

Algebra ->  Inequalities -> SOLUTION: This question deals with Quadratic Inequalities and rational inequalities. The question reads: x^2+4x>21. 4x and 21 do not evenly distribute so unsure how to solve this.      Log On


   

Question 278739: This question deals with Quadratic Inequalities and rational inequalities. The question reads: x^2+4x>21. 4x and 21 do not evenly distribute so unsure how to solve this.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
x^2 + 4x - 21 > 0

factoring ___ (x + 7) (x - 3) > 0

for the product to be >0, either both factors are >0 or both factors are <0

for both >0 ___ x > 3

for both <0 ___ x < 7

so, (x < 7) OR (x > 3)