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Kezia
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I'm confused about how to solve this?
myininaya
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Square both sides to undo that radical. :)
You are trying to get to the t so undo the things around it.
ajprincess
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In order to solve for t u have to isolate t.
1.Square both sides
2.Add 5 to both sides.
Kezia
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okay
Kezia
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Then t = 9
TheViper
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\[\sqrt{t-5} = 2\]
\[t-5 = 4\]
\[t = ?\]
ajprincess
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yup perfect:)
TheViper
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right :)
Kezia
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Now what about one like x = √(56-x)
ajprincess
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whenever u have square roots on one side try to remove them by squaring both sides.
Can u plz tell me vat u get when u square both sides?
Kezia
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x^2= 56 - x
Kezia
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then would i use quadratic formula
ajprincess
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yup right:) good work.:)
Nw bring all the terms to one side.
Then use quadratic formula to find x.
Quadratic formula is
\[x=\frac{ -b\pm\sqrt{b^2-4ac} }{ 2a }\]
Kezia
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-8 and 7
Kezia
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x = -8 and 7
ajprincess
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yup perfect:) great work:)
Kezia
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Thanks!
ajprincess
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welcome:)