Question

Which of the following is a perfect square trinomial ?

Answer 1

For this case, we have that by definition, a perfect square trinomial, is a polynomial of three terms (also called trinomial) that results from squaring a binomial.

$(a + b) ^ 2 = a ^ 2 + 2ab + b ^ 2\\(a-b) ^ 2 = a ^ 2-2ab + b ^ 2$

We have:

$4x ^ 2-20xy + 25y ^ 2\\(2x) ^ 2 = 4x ^ 2\\(5y) ^ 2 = 25y ^ 2$

So:

$2 * 5y * 2x = 20xy$

So, $4x ^ 2-20xy + 25y ^ 2$we can write it as:

$(2x-5y) ^ 2$

Answer:

Option A

Answer 2

Answer:

The answer is A

Step-by-step explanation: