Find the difference of the following sequence: -7 -9 -11

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Having a hard time understanding this question (see attachment).