What is the total number of roots for the following equation? y = 4x6 - 12x5 - x4 + 2x3 - 6x2 - 5x + 10
A) 7
B) 5
C) 4
D) 6

because that’s us why

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.  

i don't even know how to read that, ill try to do it if you translate it into english.