Quadratic Equation of 1/2 and 5?
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2 and 5?
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Answer:
Standard Form
The Standard Form of a Quadratic Equation looks like this:
Quadratic Equation: ax^2 + bx + c = 0
a, b and c are known values. a can't be 0.
"x" is the variable or unknown (we don't know it yet).
Here are some examples:
2x2 + 5x + 3 = 0 In this one a=2, b=5 and c=3
x2 − 3x = 0 This one is a little more tricky:
Where is a? Well a=1, as we don't usually write "1x2"
b = −3
And where is c? Well c=0, so is not shown.
5x − 3 = 0 Oops! This one is not a quadratic equation: it is missing x2
(in other words a=0, which means it can't be quadratic)
Quadratic Graph
Have a Play With It
Play with the "Quadratic Equation Explorer" so you can see:
the graph it makes, and
the solutions (called "roots
Explanation: