SOLUTION: finding the roots, using the quadractic formula {{{5A^2+2A-1=0}}}

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Question 1068236: finding the roots, using the quadractic formula

5A%5E2%2B2A-1=0
Found 3 solutions by josgarithmetic, ikleyn, Lightning_Fast:
Answer by josgarithmetic(39620) About Me  (Show Source):
Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.
On solving quadratic equations, see the lessons
    - Introduction into Quadratic Equations
    - PROOF of quadratic formula by completing the square
    - Solving quadratic equations without quadratic formula
    - Who is who in quadratic equations
    - Using quadratic equations to solve word problems
in this site.


Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook under the topic "Quadratic equations".


Answer by Lightning_Fast(78) About Me  (Show Source):
You can put this solution on YOUR website!
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
a=5
b=2
c=-1
Plug and chug where A is not equal to a