Question

N squared + n squared+ n squared for n = - 1

Answer 1

given

${n}^{2} + {n}^{2} + {n}^{2}$

for n = -1

substitute them into the equation

$= ( { - 1})^{2} + ( { - 1})^{2} + ( { - 1)}^{2}$

when you square a negative number, it becomes positive.

because negative×negative = positive

$= 1 + 1 + 1$

$= 3$

as final answer