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Jack - math

Questions (2)

With an equation like: (y^7)^-2,why is the answer = 1/(y^14) and then I look at a similar type of problem: (x^-3)^-5 = x^15. How
1. 2 answers
2. 106 views
I have solved this equation on accident, but my issue is that I cannot figure out why: y^2 - 9 is factored as (y−3)(y+3)
1. 3 answers
2. 106 views