Answer:
I believe it is A and B
Step-by-step explanation:
Answer:
18.05
Step-by-step explanation:
0.65×3=1.95
20-1.95=18.05
The perfect square trinomial will be
,
Expression 2 and 4 are correct.
<h3>What are trinomials?</h3>
A mathematical expression with three terms or three monomials is called a trinomial. Polynomials having only three terms are known as trinomials.
The second and fourth expression seems to be the perfect square let's check it.
Expression 2;
![x^2 + 14x+49 \\\\ x^2+7x+7x+49 \\\\ x(x+7)+7(x+7)\\\\ (x+7)(x+7) \\\\ (x+7)^2](https://tex.z-dn.net/?f=x%5E2%20%2B%2014x%2B49%20%5C%5C%5C%5C%20x%5E2%2B7x%2B7x%2B49%20%5C%5C%5C%5C%20x%28x%2B7%29%2B7%28x%2B7%29%5C%5C%5C%5C%20%28x%2B7%29%28x%2B7%29%20%5C%5C%5C%5C%20%28x%2B7%29%5E2)
Expression 4;
![x^2-24 x +144 \\\\ x^2-12x-12x+144 \\\\ x(x-12)-12(x-12) \\\\ (x-12)^2](https://tex.z-dn.net/?f=x%5E2-24%20x%20%2B144%20%5C%5C%5C%5C%20x%5E2-12x-12x%2B144%20%5C%5C%5C%5C%20x%28x-12%29-12%28x-12%29%20%5C%5C%5C%5C%20%28x-12%29%5E2)
Hence the perfect square trinomial will be
,
.Expressions 2 and 4 are correct.
To learn more about the trinomials refer to the link;
https://brainly.in/question/8498839