wanderspamlust
wanderspamlust wanderspamlust
  • 26-03-2020
  • Mathematics
contestada

a^2−8ab+16b^2=81, find a–4b

Respuesta :

meowdolgov
meowdolgov meowdolgov
  • 01-04-2020

Answer:

-9, 9

Step-by-step explanation:

a² − 8ab + 16b² = 81

(a - 4b)² = 81      Wrote the left-hand side as a square

 a - 4b = ±9     Took the square root of each side

All values of a - 4b are -9 and +9.

Answer Link

Otras preguntas

Could someone please explain to me clearly how to work this out using quadratics? Find the values of a, b, c, d and e that make this following equation true. 4
What is the square root of 154.
In what way was the Islamic expansion into India similar to the way Islam expanded in other areas? Islamic expansion into India was facilitated by both Islamic
is this sentence correct or is it missing a comma? You'll see the club right after the sports stadium, the big domed building.
Whose abolitionist novel, published in 1852, “started this big war”? Barton Lincoln Stowe Tubman
What important event occurred during the exodus of the Hebrews from Egypt? The Hebrews settled mainly in one place. The Temple of Jerusalem was built. The Hebre
What is the area for 140cm wide 190 cm long
What is it called when one event occurs and another happens as a direct result?
What part did the slave trade play in helping Europeans take control of much of Africa in the 1800s?
how did the U.S. government promote domestic businesses and industries?