second degree polynomial equation written in the standard form 「ax²+bx+c=0」
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ax²+bx+c=0
"formula" for the quadratic equation
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perfect square
number obtained by multiplying an integer by itself
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solution
number that satisfies the equation and is the root of the equation
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factors
two or more expressions that produce the given express when multiplied
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perfect square trinomial
polynomial with three terms, first and last are perfect squares while the middle term is +/- twice the sum of the square roots of the first and last terms
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zero product property
given real numbers a and b, if ab=0 then either a or b =0
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completing the square
method for solving quadratic equations by changing an incomplete quadratic trinomial into a perfect square trinomial