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Mathematics 16 Online
iosangel:

help pls http://prntscr.com/l1ui46

iosangel:

@Vocaloid

dude:

Multiply the exponents

iosangel:

ok

563blackghost:

Distribute the exponent into the parenthesis by multiplying. \(\Large\bf{x^{5 \times \frac{2}{3}}~y^{3 \times \frac{2}{3}}}\) What does that simplify to?

iosangel:

x^10/3 y^2

563blackghost:

Correct. Now since you have \(\large\bf{x^{\frac{10}{3}}}\) you would change this into radical form. Follow by: \(\Large\bf{x^{\frac{m}{n}} = \sqrt[n]{x^{m}}}\) So how would you turn \(\Large\bf{x^{\frac{10}{3}}}\) into radical?

iosangel:

3sqrt10

563blackghost:

Correct. Now you need to split the \(\large\bf{x^{10}}\) into two terms that have one perfect square. If we add 9 and 1 we get 10, 9 is a perfect square so factor it out. \(\Large\bf{\sqrt[3]{x^{10}} ~~\rightarrow ~~ \sqrt[3]{x^{9}x}}\) Now we need to rewrite this so we can pull the term out. `Remember if an exponent expression is brought the power of an exponent then the exponents will multiply` So 9 `splits to 3 x 3`. \(\Large\bf{\sqrt[3]{(x^{3})^{3}x}}\) How would this simplify?

563blackghost:

`Look at the exponent and the cube rooting, you see x is being brought to the power of 3 which cancels the cubing, meaning x^3 is brought out`

iosangel:

3√(x^27

563blackghost:

Not quite. `When an exponential expression is brought to the power of another exponent the exponents will multiply.` So to simplify we had split \(\large\bf{x^{10}~~\rightarrow ~~x^{9}x}\) But our exponent is cube rooted. So we split the \(\large\bf{x^{9}~~\rightarrow (x^{3})^{3}}\) because we need to take the term out. So \(\Large\bf{\sqrt[3]{(x^{3})^{3}x} ~~\rightarrow ~~ x^{3}\sqrt[3]{x}}\) `BECAUSE THE POWER OF 3 CANCELS OUT WITH THE CUBE ROOTING` (not shouting just pointing out cx) So you end with... \(\Large\bf{x^{3}y^{2}\sqrt[3]{x}}\)

iosangel:

thank youuu

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