Can someone help me on this

Since this is a right triangle, we can you the pythagorean theorem.

a^2 + b^2 = c^2

In this case,

a = 6

b = ?

c = 10

We need to substitute our values into the pythagorean theorem.

(6)^2 + b^2 = (10)^2. Reduce everything to its simplest form.

36 + b^2 = 100. Subtract 36 from both sides.

b^2 = 64. Take the square root of each side.

b = 8.

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