SOLUTION: y²+3y=1

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Question 1086364: y²+3y=1
Found 2 solutions by ikleyn, Alan3354:
Answer by ikleyn(52777) About Me  (Show Source):
You can put this solution on YOUR website!
.
y%5E2%2B3y = 1   ====>   y%5E2+%2B+3y+-+1 = 0  ====>

Apply the quadratic formula

y%5B1%2C2%5D = %28-3+%2B-+sqrt%283%5E2+%2B+4%2A1%29%29%2F2 = %28-3+%2B-+sqrt%2813%29%29%2F2.


There are two solutions:  y%5B1%5D = %28-3+%2B+sqrt%2813%29%29%2F2  and  y%5B2%5D = %28-3+-+sqrt%2813%29%29%2F2.

On quadratic formula see the lessons
    - Introduction into Quadratic Equations
    - PROOF of quadratic formula by completing the square
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 Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
y²+3y=1
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