# Math Help

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#### shermaine

##### New Member
Hi,

I got this equation (T1^2 + 7T1 - 2) / (8 + 4T1 + T1^2)
How do i solve the T1?
Can i use 8 + 4T1 + T1^2 = T1^2 + 7T1 -2?
Then 8+2 +4T1 -7T1 + T1^2 - T1^2?
I tried this, but i cant get the right ans

#### Roff

##### Well-Known Member
Hi,

I got this equation (T1^2 + 7T1 - 2) / (8 + 4T1 + T1^2)
How do i solve the T1?
Can i use 8 + 4T1 + T1^2 = T1^2 + 7T1 -2?
Then 8+2 +4T1 -7T1 + T1^2 - T1^2?
I tried this, but i cant get the right ans
That's not an equation.

#### shermaine

##### New Member
how should i work it out and use quadratic to find

#### Roff

##### Well-Known Member
how should i work it out and use quadratic to find
I repeat - It is not an equation! An equation has an equal sign in it.

Last edited:

#### shermaine

##### New Member
Hi Roff,

Thanks! I typed wrongly.
The equation should be :
tan(kl) = [4 + (2T1)^2 / [2T1^2 + 7T1 - 2]
How should i solve?

#### Roff

##### Well-Known Member
Hi Roff,

Thanks! I typed wrongly.
The equation should be :
tan(kl) = [4 + (2T1)^2 / [2T1^2 + 7T1 - 2]
How should i solve?
What is kl? Don't you have one equation and 2 unknowns? That can't be solved.

#### shermaine

##### New Member
k is a constant which is 2pi/wavelength and L is the length
The answer for T1 = 5.1623 and -1.1623, how do i get these values?

#### Roff

##### Well-Known Member
How do you solve it if you don't have values for k and l?

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