10 points !!
Which expression is equivalent to this polynomial x^2+12

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?