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alex.gellatly
- Master | Next Rank: 500 Posts
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ax = -b
1)a + b > 0
a + (-ax) > 0
a - ax > 0
a(1-x) > 0
if a is negative (1-x) is negative - > x positive
if a is positive (1-x) is positive -> x is positive or negative
statement is not valid by itself
2)a - b > 0
a + ax > 0
a (1+x) > 0
if a is negative, (1+x) is negative -> x is negative
if a is positive, (1+x) is positive -> x is positive or negative
statement is not valid by itself
combination: add eq1 and eq2
2a > 0 -> a > 0
Positive x (x)+ b = 0
Positive x (x) = - b
If x is positive -> b is negative
If x is negative -> b is positive
Combination doesn't work either.
