SOLUTION: how to find the zero 2x^2-x-1

Question 1076197: how to find the zero 2x^2-x-1

Found 3 solutions by MathLover1, ikleyn, MathTherapy:
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

to find the zero , first set it equal to zero
.....you can use quadratic formula
....in your case , , and

solutions:
=> =>
or
=> =>

Answer by ikleyn(52932)   (Show Source): You can put this solution on YOUR website!
.
There is a bunch of lessons on solving quadratic equations in this site:
    - 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

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 MathTherapy(10559)   (Show Source): You can put this solution on YOUR website!

how to find the zero 2x^2-x-1

This should be in the form of an equation, as follows:
--------- Substituting 0 for y
----- Factoring TRINOMIAL on left
2x + 1 = 0 OR x - 1 = 0
2x = - 1 OR x = 0 + 1

This is the SIMPLEST and best method, if you're familiar with it.
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