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# How do you solve the value of x for quadrilaterals?

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Roots of a Quadratic Equation (with examples)

1. A quadratic equation can be represented by the following:

where , , and are rational and is not zero

2. The roots of this quadratic equation can be determined as follows:

(0.1)

divide (0.1) by gives:

(0.2)

subtracting from both sides of (0.2) gives:

i.e.:

(0.3)

Now to solve this, we need to complete the square for the expression on the left hand side of (0.3) i.e.
To do this, we apply the rule for completing a square which is to add the square of ...

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