vocabulary Flashcards
how does a constant function look on a graph?
horizontal line
define quadratic
polynomial function with the highest exponent being 2
whats the shape of a quadratic called?
parabala
what are the 5 methods to solve a quadratic
factoring, graphing, formula, complete the square, square roots
define factoring
to write something out as multiplication
whats always the first step in factoring?
gcf
what do you need to have for factoring?
leading coefficient must be positive
define square
numbers that have a rational square root
what needs to be true for a variable to be squared
needs to have an even exponenet
define perfect cube
taking the cube root of something and getting a rational number
what to the exponents of veriables need to be to be considered a “perfect cube”
a multiple of 3
what does the index on a radical tell you?
tells you to what root the radicand is being taken, if no index, then its to the square root
what does the coefficent of a radical do?
you multiply this by the radical as you’re going
what does the radical in a radical do?
its the symbol that divides the radicand from the index and coefficent
what does the radicand do in a radical?
its the number being taken down by the index number
if a radical has an even index and an odd radicand, what happens?
the radical is undefined
what can we assume when using variables in radicals?
that its a real number
When do you need an absolute value bar on the coefficient of a radical?
When theres an even index, original problem has an even exponent (under radical), and if theres an odd exponent in the answer
When will you NEVER need an absolute value bar in a radical?
when theres an odd index (such as 3)
6 (index=3)√5
six cube root of 5