Indices help

Can someone tell me why n- multiplies with -2 to create +2. Screenshot 2023-05-18 180658.png

Can someone tell me why n- multiplies with -2 to create +2.

It’s to do with subtraction (of indices) not multiplication.

n - (2n - 2) =n - 2n - - 2 = n - 2n + 2 = -n + 2

Original post by old_engineer

It’s to do with subtraction (of indices) not multiplication.

n - (2n - 2) =n - 2n - - 2 = n - 2n + 2 = -n + 2

My bad. That's what I had meant haha. But I still don't understand how you get - - 2, if you are subtracting -2 from n.

My bad. That's what I had meant haha. But I still don't understand how you get - - 2, if you are subtracting -2 from n.

Thats because you are subtracting a -ve number e.g 6 - - 2 = 6 + 2

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