can someone help me with radicals? please :(

- anonymous

can someone help me with radicals? please :(

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- anonymous

hey

- anonymous

hello @Calle87

- anonymous

question?

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## More answers

- anonymous

its this. @Calle87

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- anonymous

okay whats the question

- anonymous

its in the attachment. @christiano123

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- anonymous

ok, so i have row d done

- anonymous

\[\sqrt{18}+2\sqrt{75}-\sqrt{48}\]

- anonymous

okay c: @Calle87 thanks.

- anonymous

so with radicals you can simplify each one by splitting them into smaller radicals

- anonymous

\[\sqrt{18}=\sqrt{9}\sqrt{2}=3\sqrt{2}\]

- anonymous

like the square root of 18, is a decimal so you break it down and use a number that equals to 18 like 9x2 and since its still big you can simplify 9x3? @Calle87

- anonymous

\[2\sqrt{75}=2(\sqrt{25})(\sqrt{3})=2(5)\sqrt{3}=10\sqrt{3}\]

- anonymous

ya see what i did?

- anonymous

\[\sqrt{9}\sqrt{2}\]

- anonymous

whats the square root of 9?

- anonymous

3 @Calle87

- anonymous

so 2 cant be simplified but 9 can oh i see

- anonymous

ya they dont want decimals

- anonymous

you want the largest possible square root with the smallest

- anonymous

ie 9 and 2 for 18

- anonymous

aha i just dont understand the last one were it has y @Calle87

- anonymous

ok so the last one,

- anonymous

yea @Calle87 the y's confuse me with the exponents.

- anonymous

\[3(\sqrt{2y})(\sqrt{y^2})\]

- anonymous

\[\sqrt{2y^3}=\sqrt{2y}\sqrt{y^2}\]

- anonymous

see what i did?

- anonymous

and what if there is a number on the outside of the sqrt and one on the inside? do you just bring the outside one down and fin the sqrt of the inside? @Calle87

- anonymous

\[3(\sqrt{2y})(\sqrt{y^2})\]

- anonymous

what is the square root of y^2?

- anonymous

is it y?

- anonymous

yes!! :)

- anonymous

\[3(\sqrt{2y})(y)\]

- anonymous

\[3y \sqrt{2y}\]

- anonymous

first expression is simplified

- anonymous

can you do the 2nd?

- anonymous

oh i get it is the second one A? i think it is c: @Calle87

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- anonymous

of the last row

- anonymous

the last one? @Calle87

- anonymous

it is c

- anonymous

the second one is C

- anonymous

the last row is E

- anonymous

fourth row is D

- anonymous

oh i thought it was a because of the 3 and the 4 sqrt

- anonymous

what are you asking?

- anonymous

because i saw the second one say 3y sqrt 4y and i thought it was the first one because it said 3 sqrt 2 because 4's sqrt is 2.

- anonymous

so you are having problems with the second row?

- anonymous

no i got an a c: thanks :D

- anonymous

ok, so no more?

- anonymous

yea no more thanks :D i understand them now c:

- anonymous

cool! great job @ahoymewmew

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