How do you solve #6x^2+x>1#?
1 Answer
Explanation:
Factoring
we have
which will be equal to zero when
We not interested in when
Rather we are interested in the ranges set up by these "boundaries"
That is we are interested in the ranges:
We can test each of these ranges by picking any easily evaluated sample value of
and then seeing if that value satisfies the required inequality.
For example:
#{:(,"|","in range " x < -1/2,"in range "x in (-1/2,1/3),"in range "x > 1/3), (,"|",underline("sample: " x=-1),underline("sample: "x=0),underline("sample: "x=+1)), (6x^2+x,"|",color(white)("XXX")5,color(white)("XXX")-1,color(white)("XXX")7), (6x^2+x > 1?,"|","True","False","True") :}#