03-06-2020
Mathematics

contestada

If 4x^2 – bx + 81 is a perfect square trinomial. Then the value of b is

Respuesta :

SvetkaChem SvetkaChem

03-06-2020

Answer:

b = 36

Step-by-step explanation:

perfect square: a² - 2ac + c²

4x²- bx + 81 = (2x)² - bx + 9² = (2x)² - 2*(2x)*(9) +9²= (2x)² - 36x +9²,

so b = 36

Answer Link

Otras preguntas

how do i solve this infinite geometric series?64/25-16/5+4-5

Who were the Britons fighting against in the middle ages?

what types of units are used to describe area?

How do u do this ??? Alistair buys an antique chair for £600. It is expected to increase in value at the rate of 4.5% each year. How much is it expected to be w

Any facts on string art? I can't find any!

Why is the enlightenment considered the turning point in world history

11. Consider the elements neon, bromine, and phosphorus. Which has five electrons in its 4p sublevel?

8k-1=15 ? Help I have a question were we have to work this out what do I do?

a meter stick casts a shadow 1.4 m long at the same time a flagpole casts a shadow 7.7 m long. The triangle formed by the meterstick and its shadow is similar t

Suppose x + y = 6 and xy = 4. Find the value of x² y + xy² without solving the equations.