anab4azeron anab4azeron

15-05-2016
Mathematics

contestada

Solve the equation by completing the square. -9n^2+79+=-18n

Respuesta :

16-05-2016

Hello,
-9n²+79=-18n
==>9n²-18n-79=0
==>9(n²-2n+1-1)-79=0
==>9(n-1)²-88=0
==>[3(n-1)-2√22][3(n-1)+2√22]=0
==>3(n-1)=2√22 or 3(n-1)=-2√22
==>n-1=2/3*√22 or n-1=-2/3*√22
==>n=1+2/3*√22 or n=1-2/3*√22

Answer Link

Otras preguntas

What is this answer?10y=360°

Solve proportions 13/25 = p/100

find the proportionality of y=7.25x

A spinner is divided into 16 sections.3 sections are red 6 are blue 5 are purple and 2 are orange. If you spin the spinner what is the probability that you will

16. The main reason self-confidence is important in human relations is because

A 75 force is applied to the side of a crate resting on a level floor. The crate has a mass of 25kg. If the coefficient of static friction is .15, is the 75 N f

work out the parallelogram of base 6cm and height 8cm

What number is halfway between 3000 and 4000

how many atoms in C9H8O4

Stan works on an assembly line. What effective and appropriate approach would he be wise to use when coping with minor frustrations like hang-ups on a conveyor