exam
Maths Puzzle
Numerical Ability
a letter that is used in place of a numeral
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exam Other Question
This was on my test, I need to correct it but I can't figure it out:
Add and simplify.
2x^2 x 1
---- + ----- - -----
x^4-1 x^2-1 x-1
how do you find the absolute value of a fraction?