MacarenaYague1115 MacarenaYague1115

14-08-2018
Mathematics

contestada

If 3x-6y = 9z, which of the following expressions is equivalent to x^2-4xy+4y^2?

A. 9z
B. 3z^2
C. 9z^2
D. 81z^2

I need help on how to solve this problem, thank you.

Respuesta :

14-08-2018

The first and the difficult thing is you need to tell that

x^2-4xy+4y^2 = ( x - 2y )^2

so from question you know 3x - 6y = x - 2y = 9z

finial : ( x - 2y )^2 = ( 9z )^2=81z^2

so the answer is D . Hope this would help you .

Answer Link

Otras preguntas

How old was Henry the eighth when he died ??

It is impossible to receive messages from other people at the same time we are sending messages. 1. True2. False

- What is the purpose of DNA polymerase?

During the 20th century, civil rights were expanded in several ways. Please choose one way in which civil rights were expanded during this century and explain t

4condtions on the slave ship

tone map of 1969 by alex dimitrov

Evaluate the lasting impact of the Judiciary Act of 1789.

Ben has 50 drinks and paid 2$ for each. What is 67% of the final price ?

Indicate whether each of the following creates a demand for or a supply of European euros in foreign exchange markets:

Which of the following describes one function of a graphics processing unit (GPU)? 1.Frees up ROM 2.Calculates physics 3.Explains screen actions 4.Runs the oper