solve (x-9)2=4 using the square root method
- Thread starter bailey07
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Daniel_Feldman
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Re: please help!
(x-9)^2=4
So x-9= +/- sqrt(4)=+/- 2
x-9=2 or x-9=-2
x=11 and x=7 are both solutions to the equation.
Recall that squaring a negative number gives a positive number, so while a positive number actually has one principal root (the positive one), it technically has 2 square roots.
(x-9)^2=4
So x-9= +/- sqrt(4)=+/- 2
x-9=2 or x-9=-2
x=11 and x=7 are both solutions to the equation.
Recall that squaring a negative number gives a positive number, so while a positive number actually has one principal root (the positive one), it technically has 2 square roots.
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Your book gave you a fairly straightforward and formulaic method. Where are you stuck in the plug-n-chug process?bailey07 said:
. . . . .Google results for "solve quadratic square root"
Please be complete. Thank you!
Eliz.