Perimeter- add all sides together
8+8+5+5
26
Yes I worked it in my brain hahahahahah
Multiply it out
x^2 + 4x -8x -32
Combine like terms
x^2 -4x - 32
4 (e)
sin^8 x - cos^8 x
= (sin^4 x + cos^4 x)(sin^4 x - cos^4 x)
= (sin^4 x + cos^4 x)(sin^2 x - cos^2x)(sin^2 x +cos^2 x)
= (sin^4x + cos^4 x)( sin^2 x- cos^2 x)
Sorry I cant do 4 (d).
