Question 1025113
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It is arithmetic. 
It is what you MUST do yourself.
Do not ask your tutors to make YOUR job instead of you.


If you don't know quadratic formula, see these lessons

   <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/Introduction-Into-Quadratics.lesson>Introduction into Quadratic Equations</A>

   <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/proof-of-quadratic-by-completing-the-square.lesson>PROOF of quadratic formula by completing the square</A>

in this site.
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