By:Camille Omnes 

is the curve formed from all the points (x,y)

 a vertical line that divides the parabola into two congruent halves

 any equation where x represents an unknown, and a, b, and c represent known numbers 

Ax^2 + Bx + C = 0

 given by y = a(x - h)2 + k, where (h, k) is the vertex of the parabola

If a × b = 0 then a = 0 or b = 0  

any value of the variable for which the function is 0

Finding what to multiply together to get an expression

an expression of the form a^2 – b^2 = (a + b)(a – b) 

product you obtain when you square a binomial

 For ax^2 + bx + c = 0, the value of x is given by: x = [ -b ± sqrt(b^2 - 4ac) ] / 2a

 name given to the expression under the square root (radical) sign in the quadratic formula

any number of the form a+bi, where b(not equal)0, i=(sqrt)-1. bi is the imaginary number

imaginary numbers and real numbers together make up the set of complex number