Given a polynomial that has zeros of −4, 2i, and −2i and has a value of 60 when x=−1. Write the polynomial in standard form axn+bxn−1+…. Answer using reduced fractions when necessary.

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.  

assuming this is from a math graphing problem.

7 would be on the x-axis which is the horizontal line on the graph

84 would be on the y-axis which is the vertical line on the graph