>
Get 0 on the right side:
- > 0
Get an LCD on the left of (7x-2)(x+1):
- > 0
- > 0
> 0
> 0
> 0
Factor 2 out of the top:
> 0
Divide both sides by 2
> 0
The numerator has no real zeros.
Find real zeros of the denominator
7x-2 = 0, x+1 = 0
x = , x = -1
-----o--------o--------
-1
Possible
intervals
for
solutions: | (-∞,-1) | (-1,) | (,∞)
-----------------------------------------
test value | -2 | 0 | 1
-----------------------------------------
sign of f(x) | + | - | +
-----------------------------------------
f(x) > 0 | YES | NO | YES
Solution: (-∞,-1) ⋃ (,∞)
Edwin