Which polynomial is the perfect square trinomial? And why??? Help Please!!
1 answer:
<h3>Answer:</h3>
See the attached
<h3>Step-by-step explanation:</h3>When you square the binomial (a -b), you get ...
... (a -b)² = a² -2ab +b²
That is, both the a² and b² terms have positive signs, and the middle term is twice the product of the roots of the squared terms.
The last two selections have negative signs on the constant, so cannot be perfect square trinomials.
The first selection has a middle term that is -ab, not -2ab, so it is not a perfect square trinomial, either.
The second selection is the correct one:
... 4a² -20a +25 = (2a +5)²
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Answer:
Step-by-step explanation:
Complement of the event
In the expression that you are given, n is the is number in the sequence. So in this scenario, n=16. So substitute the 16 into the equation. 
. So the 16th term in the sequence is -25.