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I need help with algebra can someone help me please

Melissax05

Sure

Original post by Sir Cumference

Sure

I need help with solving simultaneous problems and substitute

Reply 3

username1732133

Original post by Laurax05

I need help with solving simultaneous problems and substitute

Posta particular question and what you have done so far.

Reply 4

Melissax05

Original post by BuryMathsTutor

Posta particular question and what you have done so far.

solving quadratic equations for example x^2-3x=0

Reply 5

davros

Original post by Laurax05

solving quadratic equations for example x^2-3x=0

In that example you have no constant term.

Can you see how you might factorize it?

Reply 6

Melissax05

Original post by davros

In that example you have no constant term.

Can you see how you might factorize it?

thank you for you help my friend helped me but I struggle with index form for example 5x5^2 leave your answer in index form

Reply 7

davros

Original post by Laurax05

thank you for you help my friend helped me but I struggle with index form for example 5x5^2 leave your answer in index form

OK so do you want an answer as a power of 5 like

5^n

where n is an integer?

First of all, do you know how to write 5 in the form

5^m

where m is some integer?

Reply 8

Melissax05

Original post by davros

OK so do you want an answer as a power of 5 like

5^n

where n is an integer?

First of all, do you know how to write 5 in the form

5^m

where m is some integer?

Yes please where n is the integer and am not sure if I know

Reply 9

davros

Original post by Laurax05

Yes please where n is the integer and am not sure if I know

Have you done much work with indices already?

Do you know what

5^1

is ?

Do you know what

5^2

is?

Do you know what

5^3

is ?

Reply 10

Melissax05

Original post by davros

Have you done much work with indices already?

Do you know what

5^1

is ?

Do you know what

5^2

is?

Do you know what

5^3

is ?

yep

Reply 11

davros

Original post by Laurax05

yep

So when you have something like

5 \times 5^2

you should be able to write the first factor (5) in index form, at which point you can apply the index rules that you have learned in school :smile:

Reply 12

Melissax05

Original post by davros

So when you have something like

5 \times 5^2

you should be able to write the first factor (5) in index form, at which point you can apply the index rules that you have learned in school :smile:

thank but what will be the answer

Reply 13

mathstutor24

@Laurax05 - how can you write 5 in the form

5^{n}

?

If

5=5^{n}

, then n=?

Reply 14

davros

Original post by Laurax05

thank but what will be the answer

That's what I'm trying to help you to work out :smile:

Can you write

5 \times 5^2

in the form

5^m \times 5^2

? You said earlier that you knew how to do this...

Reply 15

Melissax05

would it be 1

Original post by mathstutor24

@Laurax05 - how can you write 5 in the form

5^{n}

?

If

5=5^{n}

, then n=?

Reply 16

Melissax05

Original post by davros

That's what I'm trying to help you to work out :smile:

Can you write

5 \times 5^2

in the form

5^m \times 5^2

? You said earlier that you knew how to do this...

would be 5^1 x5^2 ugh sorry I don't know to much

Reply 17

davros

Original post by Laurax05

would be 5^1 x5^2 ugh sorry I don't know to much

OK good - you can write it as

5^1 \times 5^2

Now, have you been taught a rule about how to combine indices when you multiply numbers with the same base but different powers together?

Reply 18

Melissax05

Original post by davros

OK good - you can write it as

5^1 \times 5^2

Now, have you been taught a rule about how to combine indices when you multiply numbers with the same base but different powers together?

I think so

Reply 19

davros

Original post by Laurax05

I think so

Can you write down what that rule says?

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