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Mathematics 9 Online
OpenStudy (anonymous):

Choose the correct simplification of (x5)2. x7 x10 x3 x25

OpenStudy (andriod09):

do you mean \[5x(2)\] or \[5x^2\]?

OpenStudy (anonymous):

5x^2 sorry

OpenStudy (andriod09):

its okay. first thing is first, what do you do with the exponets?

OpenStudy (anonymous):

multiply... i think

OpenStudy (andriod09):

do you remember pendas?

OpenStudy (anonymous):

yes. that applies here ?

OpenStudy (andriod09):

yes \[5x^2\] what's first?

OpenStudy (anonymous):

exponent

OpenStudy (andriod09):

okay then, now you have what?

OpenStudy (anonymous):

5x

OpenStudy (andriod09):

what equation would you have now?

OpenStudy (anonymous):

x^10 my bad

OpenStudy (anonymous):

the equation is actually (5^2)^2

OpenStudy (andriod09):

no you wouldn't. if you have \[5x^2\] and you spit it, you wouldn't have \[x^10\] you would get \[5x^1\] and \[5x^1\] now what would you do with them?

OpenStudy (anonymous):

idk now

OpenStudy (andriod09):

okay, when you split up \[5x^2\] you would get \[5x\] and \[5x\] what would you do with the two \[5x\]

OpenStudy (anonymous):

divide ? i dont think my lessons covered this

OpenStudy (andriod09):

no. you wouldn't divide. you remember PEMDAS? you have this equation, \[5x(5x)\] what would you do now?

OpenStudy (anonymous):

i dont think my lessons covered this

OpenStudy (anonymous):

as in IDK

OpenStudy (andriod09):

okay, first when you see something like oh, lets say: 5(2) it means to multiply. so if you have \[5x(5x)\] you would multiply them. and thus you would get:

OpenStudy (anonymous):

x^25

OpenStudy (anonymous):

x^10 was correct. why did u say otherwise ?

OpenStudy (andriod09):

no its not, the answer would be \[25x\] you wouldn't do it as the exponet

OpenStudy (andriod09):

look: \[5x^2\] \[5x(5x)\] \[25x\] 5 times 5 isn't 10, its 25.

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