For each of the following quadratics:
- Write the quadratic in completed square form.
- Write the quadratic in factored form.
- Sketch the graph of the quadratic, identifying its axes intercepts, vertex, and axis of symmetry.
a. a** y=x2+4x+3
b. b** y=x2+2x−3
c. c** y=2x2−8x−10
d. d** y=−x2+6x+7