Is 18,24,30 a Pythagorean triple

Yes is a pythagorean triple

Step-by-step explanation:

To know if you can build a right triangle with those sides we have to make the following equality

h² = l1² + l2²

The hypotenuse is always the longest side so it should be 30

we check the equality of the equation

30² = 18² + 24²

900 = 324 + 576

900 = 900

Equality was fulfilled so it is a right triangle

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i