Question

x=-1 resuelva
a) -x^2+x+2
b) x^2-x-1

Answer 1

A)-x^2+x+2=

-(-1)^2+(-1)+2=

1^2-1+2=

1-1+2=

2


B)x^2-x-1=

(-1)^2-(-1)-1=

1+1-1=

1