SOLUTION: use the quadratic formula to solve:3x^2+2x-4=0? A)x=-1 B)x=sqrt(13) C)x=-1-sqrt(13) D)x=-1/3 E)=-1+sqrt(13)/3

Question 545446: use the quadratic formula to solve:3x^2+2x-4=0?
A)x=-1
B)x=sqrt(13)
C)x=-1-sqrt(13)
D)x=-1/3
E)=-1+sqrt(13)/3
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Notice that the quadratic is in the form of where , , and

Let's use the quadratic formula to solve for "x":

Start with the quadratic formula

Plug in , , and

Square to get .

Multiply to get

Rewrite as

Add to to get

Multiply and to get .

Simplify the square root (note: If you need help with simplifying square roots, check out this solver)

or Break up the expression.

or Reduce

So the solutions are or
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