Question

Help! I think I have this figured out but I wanna know for sure.
Solve using the Quadratic Form.
3x^2+5x=2

Answer 1

What was your solution?

Answer 2

I got 4,6

Answer 3

That's not what I'm getting

Answer 4

Did you first subtract the 2?

Answer 5

Yes, that's what I was unsure about. I didn't know if that was the correct way to do it. Or if you make it a perfect square.

Answer 6

Using the quadratic formula you only have to plug in values for a, b, and c, and simplify. So you should be simplifying this expression\[x={{{-5}\pm \sqrt{5^2-4(3)(-2)}}\over2(3)}\]

Answer 7

I can check your answers again for you if that would help.

Answer 8

So basically, you just input whats in the main equation?

Answer 9

And yes please (:

Answer 10

Exactly. The coefficient of your \(x^2\) term is \(a=3\), the coefficient of your \(x\) term is \(b=5\), and the coefficient of your constant term is \(c=-2\). Then you just use those to plug it into the quadratic equation.

Answer 11

Do you have to divide by 2 (a) in this case it would be 2(3)=6 so the top divided by six.

Answer 12

Yes.

Answer 13

I got 2/3 & 1...

Answer 14

Close, but not quite.

Answer 15

What'd I do wrong? :(

Answer 16

I'm not sure. Let's do this one step at a time. What's\[5^2-4(3)(-2)?\]

Answer 17

25+24?

Answer 18

Looks correct.

Answer 19

Thats where I got mixed up. I multiplied wrong. i had 25-24 and got one instead of 49..

Answer 20

That would have screwed things up.

Answer 21

Yeah, it did! Well I am pretty positive I got it this time. -1/3 , 2

Answer 22

Switch the negatives, and it'll look perfect.

Answer 23

Remember that it's a \(-5\) not a \(+5\) on top.

Answer 24

Okay, Thank you. Will you check the next problem i did?

Answer 25

Sure.

Answer 26

x^2+16=8x
And i got just 4

Answer 27

4 looks correct to me also. Good job!

Answer 28

How about x(2x-5)=12
I got 5\[\pm \sqrt{-71}\div4\]

Answer 29

theres suppose to be a 5 infront

Answer 30

That's not what I'm getting. Did you remember to distribute the x , and then subtract the 12, then use the quad. formula?

Answer 31

-3/2, 4 ?

Answer 32

I keep making simple mistakes,

Answer 33

That looks right to me. As for the simple mistakes, it's better to make them now rather than on a test. I still make many simple mistakes even though I've done all these things before.