Question

Decide 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
Help me? PLEASE!

Answer 1

Let D = b^2 − 4ac

This is known as the discriminant

Answer 2

If the discriminant D is a perfect square, then ax^2 + bx + c can be factored

Answer 3

Can you explain the factoring process to me? I am having trouble?

Answer 4

Compare

2x^2 + 7x + 3

to

ax^2 + bx + c

Answer 5

I wouldn't use quadratic formula would I?

Answer 6

what are the values of 'a', 'b' and 'c'?

Answer 7

You can if you want

Answer 8

a would be 2x^2? I am completely clueless

Answer 9

a = 2, b = 7 and c = 3

Answer 10

ahh ok so know I have 2x^2 +7x+3 would do I do with that?

Answer 11

So

D = b^2 - 4ac

D = 7^2 - 4(2)(3) ... Plug in a = 2, b = 7 and c = 3

D = 49 - 24

D = 25

Answer 12

is 25 a perfect square?

Answer 13

Yes

Answer 14

so 2x^2 + 7x + 3 can be factored

Answer 15

And the ending value is?

Answer 16

25

Answer 17

they don't want you to factor, they just want to know if it's possible to factor or not

Answer 18

they just want the value of b^2 - 4ac

Answer 19

I understand how you got the answer it is just they give me a blank to type the answer in and I'm not sure what the correct thing to put in it is.

Answer 20

you type in 25

Answer 21

that's the final value of b^2 - 4ac

Answer 22

where a = 2, b = 7 and c = 3

Answer 23

ok thank god for your help you are a lifesaver! :D

Answer 24

you're welcome

Answer 25

Got a 100 thanks to you! I won't fail Algebra! tehe;)

Answer 26

well you did most of the work, I only helped out with 1 problem

Answer 27

congrats on getting a perfect score

Answer 28

Yeah I know its just thats like the first 100 in a while thanks Again! :)

Answer 29

sure thing