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Mathematics 21 Online
OpenStudy (anonymous):

Help please!

OpenStudy (anonymous):

OpenStudy (anonymous):

@alias

OpenStudy (anonymous):

@Euler271

OpenStudy (anonymous):

raise each side to the fifth power. That should get rid of the exponent. Then solve the usual way to find x

OpenStudy (anonymous):

(make both sides)^5 you have -2x + 6 = -8 + 10x solve for x. now realize that:\[x^{1/5} = \sqrt[5]{x}\] extraneous solutions would be those that make either bracket = 0 since you can't have a negative root in "real numbers"

OpenStudy (anonymous):

wow i just read what i wrote..

OpenStudy (anonymous):

the last sentence in completely wrong. it should say: extraneous solutions would be those that make the bracket < 0 on either side. for the same reason. not = 0 though. that's fine.

OpenStudy (anonymous):

C :s @alias

OpenStudy (anonymous):

@Euler271

OpenStudy (anonymous):

amswer is not C... So after you raise each side by 5 -2x + 6 = -8 + 10x

OpenStudy (anonymous):

x should be 14/12, then simplify it to get your answer :)

OpenStudy (anonymous):

B :)

OpenStudy (anonymous):

thank u !

OpenStudy (anonymous):

it's A

OpenStudy (anonymous):

Check you math... 14/12 when simplified has to be larger than 1, and B is less than 1 so it's not right. Always check your answer and use common sense :P

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