Question

Which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring? −b, b2 − 4ac, 2a Use the part of the quadratic formula that you chose above and find its value given the following quadratic equation: 2x2 + 7x + 3 = 0

Answer 1

b^2 - 4ac, it is the discriminant, and if it is 0+ it can be factored. If it is less than 0, it cannot be factored.

Answer 2

(b^2 - 4ac)^1/2 tells you for the first part unless you are using complex

Answer 3

If the discriminant is a perfect square, the quadratic equation is factorable. I've never seen this written in a book, but one of my professors taught it to me.

Answer 4

Well, that's obvious

Answer 5

you have to take the square root of what's in the discriminant

Answer 6

answer to the question is (2x+1)(x+3).

Answer 7

in fact, that's the only part of the root that could be irrational

Answer 8

And wiz, don't do that.

Answer 9

@wizguy

Answer 10

ok thanks

Answer 11

i did this stuff in grade 5 inkyvoyd, so dont do what?

Answer 12

Don't give out the answer.

Answer 13

It's against the CoC to give it out directly. You didn't do that, but it's not exactly in the spirit of OS to give out the answer like that.

Answer 14

by any chance is it 7^2-4*2*3=49-24=25=5^2
o nevermind I thought that wizguy just gave the phony answer

Answer 15

You just basically told someone how to find the derivative of a polynomial, then gave them the answer to the question

Answer 16

without walking them through hwo to find the "derivative of a polynomial"

Answer 17

but thank you guys once again

Answer 18

That's techinically looked down upon, and it's close to answer sniping.