Question

Simplify:
(((a-4)^4)-((b+4)^4))/(((a-4)^3)-((b+4)^3))

Answer 1

\[((a-4)^4)-((b+4)^4))/(((a-4)^3)-((b+4)^3)) \]
do you mean this?

Answer 2

yes!!

Answer 3

\[\frac{(a-4)^4)-((b+4)^4)}{ ((a-4)^3)-((b+4)^3) }\]
\[\frac{((a-4)^2)^2-((b+4)^2)^2}{ ((a-4)^3)-((b+4)^3) }\]
and use the formulaes x^2 - y^2 = (x + y)( x - y ) and x^3 - y^3=(x-y)(x^2+xy+y^2)

Answer 4

but why does \[X ^{2} - Y ^{2} = (x-y)(x+y)\]?

Answer 5

OHHHHHHHHHHHH nevermind!!

Answer 6

AHAHAHHAHAh kkkz!!! THANKS!