Please help I don’t understand

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Sketch one cycle if the cosine function y=2cos2theta

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x