Question

Which of the following is a perfect square trinomial?

Answer 1

Answer:

$D.~4x^2-20xy+25y^2$

Step-by-step explanation:

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