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Put your completed square form equal to 0. Now you have an equation with a single x you can solve for.

Original post by Luwei

quadratic formula

I’ve already tried and gotten 1/root 3 and it says it’s wrong

Original post by Dancer2001

Put your completed square form equal to 0. Now you have an equation with a single x you can solve for.

I’ve already tried and gotten root 69 over 3 and it says it’s wrong

Original post by zedndead

I’ve already tried and gotten root 69 over 3 and it says it’s wrong

Maybe show your working?

Original post by mqb2766

Maybe show your working?

No it’s one answer box

Original post by zedndead

No it’s one answer box

Please read the sticky at the top of the forum about getting hints.

The flipside is you're expected to show how you tried to get the solution.

Original post by mqb2766

Please read the sticky at the top of the forum about getting hints.

The flipside is you're expected to show how you tried to get the solution.

The flipside is you're expected to show how you tried to get the solution.

This is what I did and it says it’s wrong but I don’t get how

Original post by zedndead

This is what I did and it says it’s wrong but I don’t get how

You have sqrt(23/3)

What do you do then? What is d?

Original post by zedndead

“Given that the solutions of the equation 3x^2-12x-11=0 can be written as c +/- root d, where c and d are rational numbers. Find the value of c and d.”

So far I’ve found the completed square which is 3(x-2)^2-23 and I’ve found c to be 2

So far I’ve found the completed square which is 3(x-2)^2-23 and I’ve found c to be 2

quadratic formula song

Original post by mqb2766

You have sqrt(23/3)

What do you do then? What is d?

What do you do then? What is d?

I did square root it and I got the square root of 69 over 3, and it says it’s incorrect

Original post by Gundabad(good)

quadratic formula song

Already tried that

Original post by zedndead

Already tried that

https://www.youtube.com/watch?v=E2eVZFy9yzk

A German will help you remember.

Original post by zedndead

I did square root it and I got the square root of 69 over 3, and it says it’s incorrect

sqrt69)/3 is numerically the right amswer for c +/- d, but it asks for c +/- sqrt(d).

You already have the answer, d = ...

Original post by zedndead

So I sqrt the sqrt of 69/3I just did that and I got 1.663993576, it asks for the answer to be in a fraction and it it’s simplest from

What is the fraction INSIDE the square root.

Original post by mqb2766

What is the fraction INSIDE the square root.

Original post by mqb2766

What is the fraction INSIDE the square root.

Sqrt69/3

Original post by zedndead

Sqrt69/3

Last go, you have

2 +/- sqrt(*)

What is the fraction *?

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