-2**1

[jolly wedge]

√4 is not equal to 2 it's ±2 meaning its ambiguous.

It can be 2 or -2 depending on context we make judgements

[proven vortex]

all lines are flat

[terse dust]

.solved

[queen ferry]

Solved

Post marked as solved by @terse dust.

Use .unsolved if this was a mistake.

[jolly sparrow]

No √4 only equal 2

[jolly sparrow]

Look at this

.unsolved

[queen ferry]

Unsolved

Post marked as unsolved by @jolly sparrow.

Use .solved to mark as solved.

[sullen sand]

no

the square root of a real number x >= 0 is defined as the unique y >= 0 such that y^2 = x

the square root notation is made for that

[fervent sparrow]

if you assert that sqrt 4 = 2 you cant take sqrt and sqr to get identity

so ur equation becomes 2=2 or 2=-2 which is true

[proven vortex]

all lines are flat

[jolly sparrow]

this is a general rule?

[jolly sparrow]

.solved