Rena wrote integers from 1 to 12 how many digits did she write

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

(a.s."similarity in right triangles"solve for xa.) 10b.) 20c.) 14.5d.) [tex] 6\sqrt{3} [/tex]

|2x - 6| > 10 {x|x < -8 or x > 2} {x|x < -2 or x > 8} {x|-2 < x < 8}