If x2 = 16 then this is not written as an inequality.
An inequality tells us that one thing is not equal to another.
The above is an equation, because it is telling us that one thing is equal to another.
If x2 = 16 then x = 4 & -4.
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The question cannot be answered because there is no inequality there!
If x2 < 25 Then: |x| < 5 -5 < x < 5
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It could be the solution to some quadratic inequalities: for example x2 + 2x - 3 > 0 whose solution is x < -3 or x > 1.
11-x2=-5 add -11 to both sides: 11-x2-11=-5-11 -x2=-16 divide both sides by -2: (-x2)/(-2)=(-16)/(-2) x=8 If the "x2" was supposed to be "x2", meaning exponentiation, ("x squared") and not "x2", implying multiplication, ("x times two") then we'd get: x2=16 x=±4