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Hello! 

Can someone please help me answer this problem √(t+4)=-2?  and explain to me how the answer of a square root can be negative? Lots of thanks! 

Guest Jun 14, 2017
 #1
avatar+87334 
+1

 

There is no real solution to this

 

Squaring both sides, we have that

 

t + 4  =  4

 

Subtract 4 from both sides

 

t  = 0

 

But.......subbing this back into the original equation means that

 

√] 0 + 4]  =  -2

 

√4  =  -2

 

2  = -2

 

Which is false

 

 

cool cool cool

CPhill  Jun 14, 2017

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