Bantu jawab kak. Satu pertanyaan. Sertain langkah² nya

Jawaban:

z^-7 x z^5 / z^-2

= z^(-7 + 5) / z^-2

= z^-2 / z^-2

= z^(-2 – (-2))

= z^0

= 1

penjelasan

• a^m x a^n = a^m + n
• a^m : a^n = a^m – n
• a^0 = 1