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avatar+49 

Solve each equation and express your answer in simplest radical form:

 

1.) -x2 + 4x = 13

 

2.) 5x - 7x2 = 3x + 4 

 Mar 18, 2019
edited by GAMEMASTERX40  Mar 18, 2019
 #1
avatar+6046 
0

Just use the quadratic formula.

 

Use a bit of algebra to get all the terms on one side with 0 on the other.

 Mar 18, 2019
 #2
avatar+105347 
+2

1.) -x^2 + 4x = 13

 

-1x^2 + 4x - 13   = 0

 

a =  -1      b = 4       c =  -13

 

The Quadratic Formula is

 

-b ±√  [ b^2 - 4ac ]

______________

          2a

 

So....the solutions are

 

-4 ±√ [ 4^2 - 4(-1)(-13) ]                 - 4 ±√  [ 16  - 52]               -4  ±√[ -36]

___________________   =          _________________  =   __________  =  

           2(-1)                                             -2                                    -  2 

 

 

-4  ±  6i

_______    =        2 ±3i

      -2

 

 

cool  cool  cool

 Mar 18, 2019
 #3
avatar+105952 
-2

Answer the second one yourself you lazy, rude, ungrateful person.

 Mar 18, 2019

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