# 10.3: Use Graphs to Solve Quadratic Equations

Difficulty Level: Basic Created by: CK-12
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TermDefinition
solutions of a quadratic equation The $x-$intercept of a quadratic equation is also called a root, solution, or zero.
Double Root A solution that is repeated twice.
Quadratic Formula The quadratic formula states that for any quadratic equation in the form $ax^2+bx+c=0$, $x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}$.
Roots The roots of a function are the values of x that make y equal to zero.
Zero Product Rule The zero product rule states that if the product of two expressions is equal to zero, then at least one of the original expressions much be equal to zero.
Zeroes The zeroes of a function $f(x)$ are the values of $x$ that cause $f(x)$ to be equal to zero.
Zeros The zeros of a function $f(x)$ are the values of $x$ that cause $f(x)$ to be equal to zero.

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