You complete the square
Vertex form is
![f(x) = (x - h)^2 + k~~~~~~~the~~vertex ~~is~~(h, k)](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%28x%20-%20h%29%5E2%20%2B%20k~~~~~~~the~~vertex%20~~is~~%28h%2C%20k%29)
so break it into parts
![f(x) = (x^2 + 6x + ??) + 8 - ??](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%28x%5E2%20%2B%206x%20%2B%20%3F%3F%29%20%2B%208%20-%20%3F%3F)
to keep the equation in balance to add and subtract the same value
so value ?? is
![?? = ( \frac{6}{2} )^2](https://tex.z-dn.net/?f=%3F%3F%20%3D%20%28%20%5Cfrac%7B6%7D%7B2%7D%20%29%5E2%20)
then factor the perfect square
The thing that I notice about the two triangles in terms of their size and shape is that they that is the triangles tend to appear to be of the same size and shape.
<h3>What are Congruent triangles?</h3>
Congruent triangles are known to be triangles that are said to have both the same shape and also of the same size for the two triangles.
Note that in the case above, we need to understand that the factors of a triangle are composed of 3 angles and the 3 facets and when you put the three together following the description given, a Congruent triangle will be formed.
Therefore, The thing that I notice about the two triangles in terms of their size and shape is that they that is the triangles tend to appear to be of the same size and shape.
Learn more about congruent triangles from
brainly.com/question/2938476
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