Try integration by parts, (twice, I think) with u=(x+1) and dv/dx=cosx
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(x-2)(x+2)= x2+2x-2x-4= x2-4
sure... I bet lots of people can simplify this... How 'bout 5x sq -15
2(2*4-5)+6 = 12
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No it CANT be a polygon because its open a polygon has to be close