Select the equivalent expression. (8^-5/2^-2)^-4 = ? Choose 1
A. 1/8*2^2
B. 2^6/8^9
C. 8^20/2^8
Please

C. 8^20/2^8

Step-by-step explanation:

(8^5/2²)^4

8^20/2^8

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb