What’s the vertex form of f(x)=x^2+2x-3

Which of the following is the correct equation for this function? a. y= (x+4)(x+2) b. y=x^2+ 3x – 2 c. y+ 2 = – 2(x+3)^2 d. y+ 2 = 2(x+3)^2

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?