How do I use the quadratic formula to solve #5x^2+9x-2=0#?

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Answer 1 · 2014-09-30T03:34:34

#ax^2+bx+c=0#

#5x^2+9x-2=0#

#a=5, b=9, c=-2#

Quadratic formula

#x=(-(9)+-sqrt((9)^2-4(5)(-2)))/(2(5))#

#x=(-9+-sqrt(81+40))/10#

#x=(-9+-sqrt(121))/10#

#x=(-9+-11)/10#