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Mathematics 9 Online
OpenStudy (anonymous):

Can someone explain how to simplify this fraction step by step?? thanks!

OpenStudy (anonymous):

\[(-\frac{ 2q^4 }{ 7 })^4\]

OpenStudy (anonymous):

Dangg okay

OpenStudy (anonymous):

its okay

OpenStudy (skullpatrol):

I can :)

OpenStudy (anonymous):

oh yayy :D

OpenStudy (skullpatrol):

The first rule you need is the power or a quotient rule: $$\huge (\frac{a}{b})^m=\frac{a^m}{b^m} $$

OpenStudy (anonymous):

Okay, so how would I use that in the fraction?

OpenStudy (skullpatrol):

Does that "Rule of Exponents for a Power of a Quotient" make sense? It's very similar to the "Rule of Exponents for a Power of a Product" $$\huge (ab)^m=a^mb^m$$

OpenStudy (anonymous):

yeah kinda

OpenStudy (skullpatrol):

Why only "kinda"???

OpenStudy (anonymous):

Well im still confused as to how I simplify the fraction with those

OpenStudy (skullpatrol):

Let me rewrite your fraction in a different form, you know that -a = (-1)a right?

OpenStudy (anonymous):

okay, and yes

OpenStudy (skullpatrol):

$$\huge( -\frac{2q^4}{7})^4=( (-1)*\frac{2q^4}{7})^4 $$ since $$\huge-a = (-1)*a$$

OpenStudy (skullpatrol):

Ok?

OpenStudy (anonymous):

Ohh okay

OpenStudy (anonymous):

so now I would multiply out?

OpenStudy (skullpatrol):

Yes, you can now use the rule of exponents for a power or a product.

OpenStudy (anonymous):

hmm okay

OpenStudy (skullpatrol):

$$\huge( (-1)*\frac{2q^4}{7})^4 = (-1)^4*(\frac{2q^4}{7})^4$$

OpenStudy (skullpatrol):

Do you see how I got that?

OpenStudy (anonymous):

Its not showing up..?

OpenStudy (skullpatrol):

$$\huge( (-1)*\frac{2q^4}{7})^4 = (-1)^4*(\frac{2q^4}{7})^4$$

OpenStudy (skullpatrol):

Try refreshing your browser.

OpenStudy (anonymous):

Okay

OpenStudy (skullpatrol):

Can you see it now?

OpenStudy (anonymous):

Yes

OpenStudy (skullpatrol):

Does it make sense?

OpenStudy (anonymous):

Ohh yes it does okay

OpenStudy (anonymous):

So, then multiply everything out? or leave it?

OpenStudy (skullpatrol):

We need to "multiply everything out"...do you know what (-1)^4 equals?

OpenStudy (anonymous):

it equals 1?

OpenStudy (skullpatrol):

Yes, also 1*a = a, right?

OpenStudy (anonymous):

right

OpenStudy (skullpatrol):

We are left with this $$\huge(\frac{2q^4}{7})^4$$ and we can now apply which rule?

OpenStudy (skullpatrol):

?

OpenStudy (anonymous):

Okay my computer keeps freezing up sorry its not showing as a fraction again :/

OpenStudy (skullpatrol):

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