Smail Cherifi 08/06/2023 at 12:45 am In R There is not solutions In C There are 2 solutions + – 9i Reply
Tomas Klimas 08/06/2023 at 12:45 am How the hell do you get 9 and -9? Sqrt the negative number? What? Reply
Chris Francky C. Ascura 08/06/2023 at 12:45 am x²+81=0 x²=-81 sqrt(x²)=sqrt(-81) x=sqrt(-1×9²) x=sqrt(-1)×sqrt(81); sqrt(-1)=i Therefore x=+-9i Reply
±9i
+9i, -9i
No solution!
X=±9
X=_+9i
In R There is not solutions
In C There are 2 solutions + – 9i
±9i
+-9i
X²+81=0
(x+9)(x+9)
x^2=(-9)^2
x=+-9*root(-1)
x=+-9i
±9i
x^2+81=0
x^2+9^2=0
x^2=-9^2
x=√-9^2
=9i, -9i
– + 9i
X²+81=0
X² = _81
X²=81i²
X=±9i
x²⁼-81=81i²
x=±√ (81i²)=±9i.
How the hell do you get 9 and -9? Sqrt the negative number? What?
X=+-9i is the right ans
X = +90 or -90
+-9i
Square root of a negative no. is no solution
+9i or – 9i
9i, -9i
x²+81=0
x²=-81
sqrt(x²)=sqrt(-81)
x=sqrt(-1×9²)
x=sqrt(-1)×sqrt(81); sqrt(-1)=i
Therefore
x=+-9i
+9i or – 9i
9i
x²⁼-81=81i²
x=±√ (81i²)=±9i.