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Mathematics 9 Online
OpenStudy (anonymous):

find all the values of x which are solutions. A. x2 + 2= 27 B.-5|x| = -15

OpenStudy (radar):

B. \[-\left| x \right|=-15\]

OpenStudy (radar):

messed up left off the 5.\[-5\left| x \right|=-15\]

OpenStudy (radar):

\[\left| x \right|=-15\]

OpenStudy (radar):

\[\left| x \right|=15\]

OpenStudy (radar):

Please ignore the above last two entries.\[\left| x \right|=-15\div-5=3\]

OpenStudy (radar):

\[x=\pm3\]

OpenStudy (radar):

Now for A.\[x ^{2}+2=27\] \[x ^{2}=27-2=25\] \[x=\sqrt{25}=\pm5\]

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