If (a, b) is the vertex of f(x)=-4x^2-8x+6, then what is the value of ?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)