book Maths Puzzle Numerical Ability

-4(5x - 2y + 3)

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I am not sure if this is a quadratic equation question or not but here goes.

(1/w)+(1/(w-1))=(1/(w-w^2))

I am stumped. I think the answer is W=-1 but I have also gotten W=1 hello,
this problem is driving me crazy. It is,in paranthesis, (3 sqrt 5)^5
Could you please show me how it is worked?
Thank you