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Use the Quadratic Formula to solve y=3x^2+9x-13

 Jul 13, 2020
 #1
avatar+752 
0

Solve the rational equation by combining expressions and isolating the variable y.

y=3x^2+9x−13

Hope this helps, whymenotsmart^m^.

 Jul 13, 2020
edited by whymenotsmart  Jul 13, 2020
 #2
avatar+27605 
+2

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)      In you question  a = 3      b = 9    c = -13

 

 

 

\(x = {-9 \pm \sqrt{9^2-4(3)( -13)} \over 2(3)}\)

 Jul 13, 2020
 #3
avatar+752 
0

ops, i messed up again:( just can't beat EP (*sighs*)

 Jul 13, 2020
edited by whymenotsmart  Jul 13, 2020
 #4
avatar+2422 
+2

You'll catch up! EP has been here for waaaaaaay longer than you!

CalTheGreat  Jul 13, 2020
 #7
avatar+27605 
+2

I HAVE been here for a  buh-jillion years..... and have made about that many mistakes too !

    Hang in there !   cheeky

ElectricPavlov  Jul 13, 2020
 #8
avatar+2422 
+3

Not quite buh-jillion.... I'd say 4. LOL!

CalTheGreat  Jul 13, 2020
 #5
avatar+752 
+2

thanks, Cal:)

 Jul 13, 2020
 #6
avatar+2422 
+2

Welcome! laugh

CalTheGreat  Jul 13, 2020

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