Martin is considered the expressions 1/2(7x + 48) and -(1/2x - 3) + 4(x + 5). he wants to know if one expressions is greater than the other for all values of x.

write a new expression that always has a greater value than both of these expressions.

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.