(-9)1/2 = -4.5 which is a real number.
Unless you're talking about square roots?
Explain why (-9)1/2 is not a real number but -9 1/2 is a real number.
3 answers
No I'm not talking about square roots.
If you are talking about powers,
9^(1/2) = 3
x^(1/2) = √x so you are talking about square roots.
(-9)^(1/2) is not real, because negative numbers do not have real square roots.
That is because if x = √(-9) then x^2 = -9. But all numbers are positive when squared.
9^(1/2) = 3
x^(1/2) = √x so you are talking about square roots.
(-9)^(1/2) is not real, because negative numbers do not have real square roots.
That is because if x = √(-9) then x^2 = -9. But all numbers are positive when squared.
3 answers