Can somebody please help me out ??

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

Which is the correct first step in finding the area of the base of a cylinder with a volume of 26x cubic meters and a height of 6.5 meters? v=bh 6.5=b(26x) v=bh v=26pi+(6.5) v=bh v=26pi(6.5) v=bh 26pi=b(6.5)

Which geometric principle is used to justify the construction below?