Question

simplifique as expressões a- (m-1)2 - (m+1)(m-1) b-(x+4)(x-4) - (x-4)2

Answer 1

a-(m²-2m+1)-(m²-m+m-1)+b-(x²-4x+4x-16)-(x²-8x+16)=
a-m²+2m-1-m²+1+b-x²+16-x²+8x-16= a-m²-m²+2m-x²-x²+8x-1+1+16-16+b= a-2m²+2m-2x²+8x+b= a+2m(-m+1)+2x(-x+4)+b