Ok this should be easy:]

8^18.

Step-by-step explanation:

The Law of exponents.

(x^a)^b) = x^(ab)

Why this happens?

(8^6)^3

Imagine you have 8^6.

8*8*8*8*8*8 to the power of three or ^3.

(8*8*8*8*8*8)^3.

8*8*8*8*8*8*8*8*8*8*8*8*8*8*8*8*8*8*8*8 which = 8^18.

This is why (8^6)^3=(8^(6*3) or 8^18.

Hope this helps plz hit the crown :D

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

3

step-by-step explanation: