Question

by what number minus 5 power - 1 be multiplied so that the product become -15 power - 1​

Answer 1

(-5)^-1=1/-5..... and (-15)^-1=1/-15

1/-5*x=1/-15

x=1/-15*-5/1

X= 1/3

Let's check whether answer is correct or not,

1/-5*1/3=1/-15