P•X=-10

I already know the answer but what why is P -10?

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x