Question

r^2+3r=3

Answer 1

-3/2 - sqrt21/2 and sqrt21/2 -3/2

Answer 2

quadratic right use sam formula as before.....kk apply that u will get it...kk

Answer 3

solve r2 + 3r = 3 ⇒ r=0.7913 , r=-3.791

Answer 4

you forgot the + or - sign in front of the radical

Answer 5

\[r=\frac{-3+\sqrt{21}}{2}\] and \[r=\frac{-3-\sqrt{21}}{2}\]

Answer 6

whoops\[r=\frac{-b \pm \sqrt{b ^{2}-4ac}}{2a}\]

Answer 7

Answers in the bottom

Site: http://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.327255.html

Answer 8

weird sam it looks similar to the one in this site too. ;)

Answer 9

or,
r^2+3r=3 add 9/4 to both sides
r^2+3r+9/4=21/4
(r+3/2)^2=21/4
sqrt and simplify, you will find:
-3/2 + sqrt 21/2 and -3/2 - sqrt 21/2 = r
of course, you want to simplify:
\[r=\frac12(-3\pm\sqrt{21})\]

Answer 10

hi sam can you help me with placing this in a quadratic formula x^2+18x+4=0

Answer 11

\[x=-9+\sqrt{77}\]
and
\[x=-9-\sqrt{77}\]