Solve using the Quadratic Formula.

2x2 + 3x - 6 = 0

Question

Solve using the Quadratic Formula. 

2x2 + 3x - 6 = 0

anonymous · Answer

Do you know what the quadratic formula is?

anonymous · Answer

$$\begin{array}{*{20}c} {x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}} & {{\rm{when}}} & {ax^2 + bx + c = 0} \ \end{array} $$

anonymous · Answer

in this case can you tell me what your 
a
b
c 
are?

anonymous · Answer

2 is my a 3x is my b and 6 is my c

anonymous · Answer

umm coefficients. We don't want any x's 
anyways you got   a    right
b you just need the 3 
c you forgot the - sign

anonymous · Answer

a=1
b=3
c =-6

You plug that in to the first equation but you have to do it twice. What do I mean by doing it twice? Well do you see the

$$\pm$$

This signs means plus or minus. So you have to solve it with + 
and then you have to solve it again for -

anonymous · Answer

$$x=1/4(-3-\sqrt{57})$$
$$x=1/4(\sqrt{57}-3)$$

anonymous · Answer

@pariisz241  Thank you but it's pretty straight forward from where I left off unless the person doesn't know how to plug in values or how to solve for x. Good job.