Choose the equation below whose axis of symmetry is x = 2.
y = x2 + 4x + 2
y = x2 − 4
y = x2 − 2
y = x2 − 4x + 2

The answer is y = x2 − 4
if you try to factor out all of the equations given to you (ex. 0=x2+4x+2), the only equation that can be factored out is y = x2 − 4.

y = x2 − 4
0= x2 − 4
0=(x-2)(x+2)
0=x-2   0=x+2
2=x      x=-2

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .