Ellipses have symmetry through only their major axis? true or false

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

What are the soultion(s) to the quadratic equation 40- x^2=0