I have eoct tomorrow. i don't get the quadratic formula. the question is, "solve the equation using the quadratic formula" x2 + 3x - 7 = 0
What's a,b, and c?

Question

anonymous · Answer

The quadratic formula is:
$$ax^2 + bx + c = 0 \implies x = \frac{-(b) \pm \sqrt{(b)^2 - 4(a)(c)}}{2(a)}$$

anonymous · Answer

So looking at your equation:
$$x^2 + 3x - 7 = 0$$

What number corresponds to a, b, and c?

isuckatmath · Answer

x^2=a
3x=b
7=c?

anonymous · Answer

Ok, so If I plug in those values for a, b, and c in the left part of my formula I should get the equation you have.

anonymous · Answer

$$(x^2)x^2 + (3x)x + (7) = 0$$

Is that your equation?

anonymous · Answer

Still thinking?

isuckatmath · Answer

no theres only 1 x^2 
x2 + 3x - 7 = 0 
thats my equation

anonymous · Answer

right. So what do we need to put in the blanks:

$$( )x^2 + ()x + () = 0$$

To get something that is equal to your equation?

anonymous · Answer

Err equivalent rather.