Prove algebraically that 7(n+2) – 3(n + 4) is always even

Which math sentence can be used to determine if the triangle is a right triangle?

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.

Factor the polynomial. b^2 + 4b + 4