How would you subtract from a negative

I'll use the example -5 - 2

To subtract, the easiest way for me to remember is just to temporarily ignore the negative sign in front of 5 and to add 5 and 2. You get 7, and just add a negative sign back in front of 7 and you get -7.

It's a lot easier if you try first on a number line so that you get the relationship between negatives first.

Sorry I couldn't explain it any better, but I hope I helped :)

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a