SOLUTION: how do you solve x^2-8x=10 using the quadratic formula

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Question 1132358: how do you solve x^2-8x=10 using the quadratic formula
Found 2 solutions by ankor@dixie-net.com, ikleyn:
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
how do you solve x^2-8x=10 using the quadratic formula
put in the form ax^2 + bx - 10 = 0
:
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
a=1; b=-8; c=-10
x+=+%28-%28-8%29+%2B-+sqrt%28+%28-8%5E2%29+-4%2A1%2A-10+%29%29%2F%282%2A1%29+
:
x+=+%288+%2B-+sqrt%28+64+%2B+40%29%2F%282%29%29+
:
x+=+%288+%2B-+sqrt%28+104%29%29%2F%282%29+
:
x+=+%288+%2B-+10.2%29%2F%282%29+
two solutions
+x+=+18.2%2F2
x = 9.1
and
x+=+-2.2%2F2
x = -1.1

Answer by ikleyn(52818) About Me  (Show Source):
You can put this solution on YOUR website!
.
On solving quadratic equation using the 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".


Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.