How to get x^2+6x+7 into vertex form

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2