Int. Algebra: using calculator for (m + 3.41) ^ (2) = 12.25

[Helen]

I am supposed to use my calculator for this.
I have a TI - 30 X A Texas Instruments.
I have used it for the basic things only.
Can someone direct me on how to do this?
(m + 3.41) ^ (2) = 12.25
I need to round it to the nearest hundredth.

 

[Deleted member 4993]

Re: Intermediate Algebra

Find square root of 12.25 first.

Then subtract 3.41 from above.

There is of course another solution - what would that be?

 

[stapel]

I am supposed to use my calculator for this....
(m + 3.41) ^ (2) = 12.25

Just use the same "solving with a completed square" method you've always used for solving quadratic equations in this form. Your calculator will only help at the end, when you're trying to find the decimal approximation to the solution.

Eliz.

 

[Denis]

(m + 3.41) ^ (2) = 12.25

take square of both sides:
m + 3.41 = sqrt(12.25)
m = sqrt(12.25) - 3.41
Now go punch buttons on your trusty TI

 

[o_O]

Wouldn't it be:
\(\displaystyle m + 3.41 = \pm \sqrt{12.25}\)
?

 

[Deleted member 4993]

There is of course another solution - what would that be?

Wouldn't it be: \(\displaystyle m + 3.41 = \pm \sqrt{12.25}\,\) ?

Yes of course - that (the other sign from the "plus-minus") is exactly what I was prodding for in my reply above.

 

[o_O]

Ah, just referring to Denis's post. Wasn't sure if he was implying it or not ...

 

[Helen]

Subhotosh Kahn, Stapel and ,
Thank you. Helen