(x+8i)(x-8i) how do you check to make sure it equals x^2+64

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

On a piece of paper, graph y< x-1. then determine which answer choicematches the graph you drew.13. z3. 2(3.290-1)