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But I will try to invent completing the cubic formula from competing the square formula, and use it
Yes, it is zero [0] that its answer at the back.
The book has zero as the answer at the back
I know of completing the squre, can't it be possible if I use the quadratic formula?
In fact, I don't actually know how to factor a cubic equation
Yes, they are correct
My factorisation;
m^3 - 3m - m + 3 = 0
m^3 - 4m + 3= 0
m^3 - 3m - m + 3 =0
m( m^2 - 3) -(m -3) = 0
(m - 1)(m^2 - 3) =0
let 3^x = m
(3)^2 = 3
3^2x = 3^1, 2x =1/2, x = 0.5
m = 1
3^x = 1 = 0. x = 0
Is the answers correct? If not then please, show me the correct steps
(sorry for yesterday, I was called away)
I normally, see something like 4x^2, 2x^2, 3x^2 and not 3x^3 so I am somehow confused.
I never knew you were just behind your machine
I do not understand.
You were offline when I was online, so before I realise you were online, that prompted me to say you were just behind your personal computer
Another one,
Find the value of X
3^3x - 3^x+1 - 3^x + 3 = 0
I couldn't solve
=(0.64)^1/2
= (0.64^-1)1/2
= 1.5625^1/2
=1.25
It seems my method here works
(4 * 10^-2)^-3/2
2^ -3* 10^6/2 = 125
(-3)(1/2) = (-3/2)
I see now - thank very much
I have similar problems here but I will try to solve.
Thanks once more.
I never knew you were just behind your machine
How did the 1/2 come?
Unless you help because - I am now learning your steps
Ok, I see, but if you wouldn't mind could you copy both steps here to convince me?
Thank you
Thanks Bobbym
I am having different answers with these;
Without using tables evaluate
(0.04)^-3/2 . I had 1/125 and the book has 125.
Again,
(0.64)-1/2 I had 4/5 and the book has 5/4 which is which?
Please confirm.
What is "the operator or instruction" or you mean the instruction about root sign?
but remember the square root has a precise meaning. It only takes the positive answer.
Please, illustrate it with an example to clarify it.
Thank you Bobbym!!!
I think I would be correct to say;
x = 4^2/1 = 2^4/1 = 16
What do you say?
This is how I would do it
Then please what would be the results of this;
x^1/2 = 4
Then the book says the square root of M is the same as m^1/2. What do you say?
Please, answer me at #388
Do you see why you raise both sides up to the 3 / 2 power?
Yes, I have learnt that! Thanks
Please, is the following the same?
x^2 and x^1/2