Question

a= (-1)²+(-1)³+(-2)³​

Answer 1

$( - 1) {}^{2} = 1 \\ ( - 1) {}^{3} = - 1 \\ ( - 2) {}^{3} = - 2 \times 2 \times 2 = - 8$

Minus la putere pară devine plus.

Minus la putere impară rămâne minus.

$a = ( - 1) {}^{2} + ( - 1) {}^{3} + ( - 2) {}^{3} \\ a = 1 + ( - 1) + ( - 8) \\ a = 1 - 1 - 8 \\ \boxed{a = - 8}$

Answer 2

a = 1 - 1 - 8
a = - 8