The square root.
i means imaginary number or what you would find the square root of to make -1
The symbol "i" is an imaginary number used in algebra, equal to the square root of negative one.
In Algebra, "is" means Equal (=).
"And" in algebra usually means addition.
A quadratic equation can be solved by completing the square which gives more information about the properties of the parabola than with the quadratic equation formula.
It usually refers to an introductory algebra class.
It mean to Subtract (-)