yetzelhm
yetzelhm yetzelhm
  • 02-01-2015
  • Mathematics
contestada

24x^2 - 45x - 21 = 0

Respuesta :

eu99li
eu99li eu99li
  • 02-01-2015
[tex]24x^2-45x-21=0 3(8x^2-15x-7)=0 /:3 8x^2-15x-7=0 a=8... b=-15.... c=-7 delta= b^2-4ac=449 x_1= \frac{15- \sqrt{449} }{16} x_2= \frac{15+ \sqrt{449} }{16} [/tex]√ΔΔΔΔΔΔΔΔΔ
Answer Link
konrad509
konrad509 konrad509
  • 02-01-2015
[tex]24x^2-45x-21=0\\ 3(8x^2-15x-7)=0\\ 8x^2-15x-7=0\\ \Delta=(-15)^2-4\cdot8\cdot(-7)=225+224=449\\ \sqrt{\Delta}=\sqrt{449}\\ x_1=\dfrac{-(-15)-\sqrt{449}}{2\cdot8}=\dfrac{15-\sqrt{449}}{16}\\ x_2=\dfrac{-(-15)+\sqrt{449}}{2\cdot8}=\dfrac{15+\sqrt{449}}{16}[/tex]
Answer Link

Otras preguntas

evaluate the function when x = -3
How did the Treaty of Versailles, after WWI, lead to the beiginning of WWII?
what’s the equation for this?
Please help me with my work :) marking brainly
What is the sum of the interior angles of the polygon shown below
Romeo pronounces his love for Juliet hours after they have met in the famous balcony scene. Juliet describes Romeo's promises as "too rash, too unadvised, too s
The square represent one whole PICTURE INCLUDED PLEASE LOOK AT IT!! Please help me!! AND THANK YOU FOR THE PERSON THAT DOES
Ric, Jeff, and Mark decided to invest $10,000 each in a cryptocurrency. When they decided to cash in their investment, they had accumulated quite a bit of money
7÷46 plzzzzzzzzzzzzzzzzz help
UHHHHH I NEED HELP PLEASE