Explicación paso a paso:
B) (-2.3)^2=
-2^2 ×3^2
-4×9
D) (9)^-2 =
1
9^2
..........................
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Explicación paso a paso:
B) (-2.3)^2=
-2^2 ×3^2
-4×9
= -36
D) (9)^-2 =
1
9^2
= 1
81
..........................