Question

sr(x+4)=-3

Answer 1

x+4=(-3)^2
x+4=9
x=9-4
x=5

Answer 2

-3^2=9=(x+4)
x=9-4=5

Answer 3

medal for you and me

Answer 4

u tell where u r facing problem...

Answer 5

whoa hold the phone

Answer 6

if this is \[\sqrt{x+4}=-3\] then there is no solution because the left hand side is positive and the right hand side is negative

Answer 7

how can you say LHS is positive...

Answer 8

he/she wrote "sr(x+4)" not sure precisely what is meant, but my guess is it means
\[\sqrt{x+4}\] which is certainly positive

Answer 9

yeah sr means square root only
but if we see sqrt4 den answer is 2 or -2..
so u cant say LHS is always positive...

Answer 10

\[\sqrt{4}=2\]

Answer 11

no its positive squareroot

Answer 12

Every positive number a has two square roots: , which is positive, and , which is negative. quote from wikipedia....
http://en.wikipedia.org/wiki/Square_root

Answer 13

x=5

Answer 14

yes of course every positive number has two square roots. if we call the number \(a\) then they are denoted by \(\sqrt{a}\) and \(-\sqrt{a}\)

Answer 15

so if you see \(\sqrt{x+4}\) you can be sure it is positive

Answer 16

what if we let x=0
then sqrt4=2 or(-2)

Answer 17

??

Answer 18

oh i see. if you let \(x=0\) you get \(\sqrt{0+4}=\sqrt{4}=2\)

Answer 19

2 and (-2) both because 2^2=4 also, (-2)^2=4

Answer 20

x=5. The End!

Answer 21

@morales its not baout answer... logic should b clear too..

Answer 22

about*

Answer 23

it is certainly true that \(x^2=4\) has two solutions. they are \(\sqrt{4}=2\) and \(-\sqrt{4}=-2\)

Answer 24

notice that \(\sqrt{4}\) means the positive solution , and therefore \(\sqrt{x+4}\geq 0\)

Answer 25

which is why the equation above has no solution

Answer 26

the radical sign is the principle square root... this is never negative.

Answer 27

Vedic solved the question. His logic is correct. Nothing else need be said. BTW, you can find the square root of any number positive or negative. I will leave to you geniuses to figure it out.