Mathematics, 16.02.2021 20:00 kroscioouws0q

Hiii, I have a little maths problem. So I have this at the photo. I checked and the answer should be -0,0081 . But I don't get why is it with a minus cuz a rule says: if ,,a" is a negative number and the degree is an even number then we should make the final number positive but here it's negative. I don't get why. I'll give brainliest if you can help me!

Hiii, I have a little maths problem. So I have this at the photo. I checked and the answer should b

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Hiii, I have a little maths problem. So I have this at the photo. I checked and the answer should be...