How do you find the definition of rhombus

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

Me i'm timed right now! there's 4 answer

Rose and andrew are financing $128,000 to purchase a condominium. they obtained a 15-year, fixed-rate loan with a rate of 5.05%. they have been given the option of purchasing up to four points to lower their rate to 4.81%. how much will the four points cost them?