leighannmfral
leighannmfral leighannmfral
  • 03-01-2019
  • Mathematics
contestada

Use the identity a^3+b^3=(a+b)^3−3ab(a+b) to determine the sum of the cubes of two numbers if the sum of the two numbers is 4 and the product of the two numbers is 1.

Respuesta :

gmany
gmany gmany
  • 03-01-2019

[tex]a^3+b^3=(a+b)^3-3ab(a+b)\\\\a+b=4,\ ab=1\\\\\text{Substitute:}\\\\a^3+b^3=(4)^3-3(1)(4)=64-12=52[/tex]

Answer Link

Otras preguntas

Diego is 59.5 inches tall. His brother is 40.125 inches tall. How much taller is Diego. Show your reasoning,
Which invention of the Neolithic Revolution let people loosen hard soil for farming? O A. Terraces B. Irrigation C. Ards D. Fire
derive f=ma solve 9.1
Why didn’t the European system of fighting a war work in america
PLZ ANSWER!!! WILL MARK BRAINLIEST IF CORRECT
Tabitha earned $60 in February. She earned $90 in March. What is the percent increase or decrease in Tabitha's monthly earnings?
A company is considering two designs for a machine in its manufacturing line. The first, called machine A, will cost $160000 in fixed costs and will cost $80 pe
Water noises ran by close to his ear and beams creaked and whined around him.
the empire state building
-3/4 is a rational number, but not an integer. Why