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Mathematics 6 Online
OpenStudy (ladiesman217):

i need help

OpenStudy (ladiesman217):

\[\sqrt{8x+1}=5\] \[\sqrt{x-7}+5=11\] \[-4\sqrt{x+9}=20\] \[\sqrt{6x+5}=\sqrt{53}\] \[\sqrt{x+2}+4=x\]

OpenStudy (ajprincess):

\(\sqrt{8x+1}=5\) square both sides and u will get \((\sqrt{8x+1})^2=5^2\) \(8x+1=25\) solve for x. Does that help? @ladiesman217

OpenStudy (ladiesman217):

um ya

OpenStudy (ajprincess):

so vat is x?

OpenStudy (ladiesman217):

3

OpenStudy (ajprincess):

yup good:)

OpenStudy (ladiesman217):

so the second one is\[(\sqrt{x-7}+5)^{2}=11^2\]

OpenStudy (ajprincess):

moving on to the next question \[\sqrt{x-7}+5=11\] Subtract 5 both sides. then u will get \[\sqrt{x-7}+5-5=11-5\] \[\sqrt{x-7}=6\] Square both sides \[(\sqrt{x-7})^2=6^2\]

OpenStudy (ajprincess):

when solving problems like this it is always advisable to isolate the expressions with square root signs

OpenStudy (ajprincess):

Does that help?

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