4x - 2(3x - 9)....distribute the 2 thru the parenthesis
4x - 6x + 18....combine like terms
-2x + 18 <===
1. Perfect square trinomials, are 2nd degree polynomials, of the form

so that

, which can be written as perfect squares.
2. For example

3. Thus

are perfect square trinomials.
4.

5. In the first case -b=20, so b=-20. In the second case, -b=-20, so b=20.
6. b∈{-20, 20}
Answer:
16f/h
+ 112/h
Step-by-step explanation:
thats is I just get it a week ago on a test
The answer is permutation. It is <span>the action of changing the arrangement, especially the linear order, of a set of items.
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