Square root 2x+1 +3=0 is x=4 Do you agree? Explain why or why not

asked Jul 1, 2019 94.6k views

5 votes

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1 vote

X is not 4
The correct answer would be x=-2
2x+1+3=0
2x+4=0
-4 -4
2x= -4
2 2
X=-2

Hope this helps!

Tal Humy answered Jul 3, 2019

9.6k points

3 votes

False !

If
x=4:

$√(2(4)+1+3)= √(12)\\\\√(12)\\eq0$

In fact, the true answer is
x=-2

$√(2x+1+3)=0\\\\√(2x+4)=0\\\\2x+4=0\\2x=-4\\x=-2$

Jibu James answered Jul 4, 2019

8.7k points

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