shornoramiller3
shornoramiller3 shornoramiller3
  • 12-06-2014
  • Mathematics
Answered

9x^2+5x-1=0 use quadratic formula to solve for x



Answer :

konrad509
konrad509 konrad509
  • 12-06-2014
[tex] 9x^2+5x-1=0\\ \Delta=5^2-4\cdot 9\cdot (-1)=25+36=61\\ \sqrt{\Delta}=\sqrt{61}\\ x_1=\frac{-5-\sqrt{61}}{2\cdot9}=-\frac{5+\sqrt{61}}{18}\\ x_2=\frac{-5+\sqrt{61}}{2\cdot9}=-\frac{5-\sqrt{61}}{18} [/tex]
Answer Link

Other Questions

A square has a side of s . Another square is formed that has sides one-third the length of the original square . What is the perimeter of the new square
how do you explain the midpoint of cd is e (-1,0). one endpoint is c(5,2). what are the coordinates of the other endpoint?
Write the equation of a sinusoidal function that rises from a minimum point at (-2,-1) to a maximum point at (3,9).Please explain:)
WHAT ARE THE RHYMES IN THE STORY OF `THE SEVEN AGES OF MAN ` ??
the book The Outsider question why does Dally want Ponyboy to be tough and hard like him rather than be like Johnny? Do you think Dally believes his own advic
if x+y+z=9, xy+yz+zx =26; find x²+y²+z²
what is the measure of an exterior angle of a regular quadrilateral
What is the definition of Frame of reference? Is there an equation, if soo what is it?
multiply. (4x⁸+7)²= -----(type terms in descending order)
multiply. (4x⁸+7)²= -----(type terms in descending order)