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May
21
comment Use quadratic formula to find upper and lower limits of an expression
Don't forget that multiplying 2 negatives can also yield a positive. For example, $y=1$ will work in your expression though you may not see this right away.
May
15
comment What are the values of $p$ so that equation $x^3+(p-2)x^2+(5-2p)x-10=0$ has exactly $2$ real roots…
$x^3-x^2=0$ has 2 roots: 0 and 1 as it factors into $x^2=0$ or $x-1=0$, thus there can exist a cubic with precisely 2 real roots.
May
15
awarded  Unsung Hero
May
14
answered Critique my proof? Proving f(x) is continuous at x = 0 for a defined function.
May
14
awarded  Nice Answer
May
13
comment Formula for exponents?
You could look into algorithms for functions like "Math.Pow" that make such calculations.
May
13
comment What is the purpose of the compound angle identity in trigonometry?
What if A and B are variables and don't have known values?
May
13
answered What is the purpose of the compound angle identity in trigonometry?
May
12
comment Win $n$ out of $2n+1$
What if Team 1 wins $n$ and Team 2 wins $n+1$ in the $2n+1$ games. Are they both considered winners?
May
11
comment Let $x_n$ be a sequence. Prove that $x_n \rightarrow 0 $ iff $(x_n)^{2} \rightarrow 0 $
How do you know that $x_n$ doesn't equal zero? Dividing by zero would be a big no-no to my mind.
May
8
comment How do I write an equation in x and y to represent the information given?
@Sunset, could you edit the question with that information please?
May
8
comment what does the second derivative of a linear function mean?
So the zero function is considered linear?
May
6
answered How to solve a system of linear equations using substitution or elimination
May
5
comment Given that $x^y=y^x$, what could $x$ and $y$ be?
Negatives would also be another case to consider here.
May
5
comment Repeated Permutations
regentsprep.org/regents/math/algebra/APR2/LpermRep.htm may also be useful for background here.
May
5
comment Repeated Permutations
Where are you getting that 6 from in your calculation?
May
5
answered Repeated Permutations
Apr
30
comment Permutation and combination.
Have you considered trying this with smaller numbers to see that it works?
Apr
24
comment How to apply Chinese Remainder Theorem for $x$
Have you looked at en.wikipedia.org/wiki/… ? It has simple examples to consider. It is the LCM of 9 and 17 that is 153 as the GCD is 1 actually.
Apr
20
comment For which values of $a$ does this equation have a solution(s)?
Could you edit the question to give us more detail of what you've done in terms of getting a quadratic and so forth please?