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what are the questions? :/
thats alot. lol
you got to post one at a time lol
is it too small?
just zoom in on the page to make it bigger
each queation is susposed to have it's own thing
Its own post.
ill make a new one and tag you in it
Which question are we solving ? :)
So coefficients means the number in front of the 'x' So just look in front of those 'x' values :)
5x^2 + 2x - 4 What do you think the coefficients are?
yes ! You are correct ^^
Thanks what about the next question
Except for (-4) because there is no pro numeral following the coefficient (-4)
Okay so we have: 7x^2 - x -2 - (-6x^3 + 3)
In this scenario, we just have to expand and simplify, just be careful of that minus ^^
can you walk me through it?
Okay sure ^^
Firstly, I would expand -(-6x^3 + 3 ) first
So we get something like: +6x^3 - 3
Now just collect like terms :)
would you get rid of the plus sign?
yeah you can get rid of it, I just put it in there to show you that I have expanded the minus sign inwards ^^
wouldn;t it be +6x^3 +3 ?
Ah that's the thing - (6x^3 + 3 = -6x^3 - 3
Why? What does - x + = ? Remember these rules - x - = + - x + = - + x - = - + x + = +
yeah i know those
So have you resolve the question, by collecting the like terms?
would it be 3x^3 ?
How did you get 3x^3?
By simplifying the second part
I show you how I did it and just follow through my steps :)
= 7x^2 - x - 2 - ( -6x^3 + 3 ) = 7x^2 - x - 2 + 6x^3 - 3 = 6x^3 + 7x^2 - x - 5
Is there anything you don't understand, please point it out ^^
ok i think i get it now
Okay no problem, just refer back to this previous example that we have do together to just briefly understand the concept :) So next question?
so you dont have to scroll back up
So in this question 15), we are dealing with powers, ideally 10's
So what do you think 2.3 x 10^1 = ?
do we add the powers of ten?
In this case, we are multiplying by powers of ten's
and add the regular numbers?
There isn't much adding going on in Q15) its all multiplying :)
would the answer be 9.3• 10^7 or 9.3•10^6
hmm... would you like to try again, that answer seems way off :D
here 2.3 x 10^ 1 = ?
We'll break it down
they aren't like terms thought
As we multiply by 10^1 We are moving the decimal point across to the right -> Hence it is moving to make the number bigger
none of the answers would match that.
i think i was right before, thats how my teacher taught me how to do it.
Are you allowed to use calculators?
Ah okay, that makes things much more simpler XD
i think your supposed to multiply 2.3 and 7 and multiply the powers of ten
would the answer be a
Just type in the calculator as it is displayed (2.3 x 10^1)(7 x 10^6) = 161000000
am i right?
well no to be honest, i think you may have interpreted the question wrong perhaps...
what do you think it is?
The value is 1.61 x 10^7