Answers by visitors named: Nolan

Is evrey rectangle a square? Or is evrey parallegram a rhombus I forgot.

I know that a rectangle is a square but I am not sure of the rest.

I need help on the things like tevrey square is a rectangle please helpp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Id say... b

For the first one : You put X = x² Then you have (variable change) : X² - 6X + 8 = 0 And you use common tools to solve that (use delta). You find X = 2 or X = 4. You have x² = X, so x = sqrt(X) or x = -sqrt(X). Here, the solutions are sqrt(2), -sqrt(2), 2, -2. For the second one, you simply have : x^3 = -1/8 x = sqrt3(-1/8) = -1/2

Simple equation : X = -sqrt(2)/sec(1/4) = -sqrt(2)*cos(1/4) It's not a round value.

I don't agree Anonymous. To solve 2nd degrees equations (aka find the roots of a trinomial function), you have first to put it to this form : ax² + bx + c = 0 (where a, b and c are reals) Then you have to calculate its discriminant (its delta) : Δ = b² - 4ac If Δ < 0, there is no real solution. If Δ = 0, there is one solution : x = -b/(2a) If Δ > 0, there are two solutions : x = (-b + sqrt(Δ))/(2a) or x = (-b - sqrt(Δ))/(2a)

Actually I didn't know that formula haha. Thanks!

Thank you Ms. Sue

For n=5 l=2 we get 5d, which has 5 orbitals and added s and p (1 and 3) we get 9.

4.228

The formula is wrong. It should be term(n) = ( n^3 + 23(n) - 8 ) / 2

I think it is 3w

Thanks Kendall!!!