victoriaciesielska17 victoriaciesielska17
  • 10-02-2015
  • Mathematics
contestada

factorise y to the power of 2 -y -72

Respuesta :

luana
luana luana
  • 10-02-2015
[tex]y^2-y-72=0\ \ \ | write\ -y\ as\ 8y-9y\\\\ y^2+8y-9y-72=0\\\\y(y+8)-9(y+8)=0\\\\(y-9)(y+8)=0\\\\ y=9\ or\ y=-8[/tex]
Answer Link

Otras preguntas

Why can't we breath under water?
Which causes strep throat, anthrax, and tetanus?
work out the volume of a cuboid of edge 4cm by 4cm by 7cm
a ruling family was called a
Which best describes a purpose of the Monroe Doctrine? A. to expand the territory of the United States into Spanish Florida B. to express the belief that the
a reward that follows an action is called a.human relations b.self talk c.risk-taking d.reinforcements
Seven less than the product of twice a number is greater than 5 more than the same number. Which integer satisfies this inequality?
Seven less than the product of twice a number is greater than 5 more than the same number. Which integer satisfies this inequality?
3/7 of what number is 9?
Which city is the capital of Maryland? a. Salem b. Annapolis c. Indianapolis d. Montpelier