Factorise a^2-b^2 but it has no indecies

Which of the following expressions is equal to 2x^2+8

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

Jenny earned a 77 on her most recent test jenny score is no less then 5 points greater then 4/5 of terrance’s score if t represents terrance score which inequality represents the situation