book Maths Puzzle Numerical Ability

I also need help with this problem, it says to Simplify the product using the distributive property.

(5h-5)(5h-6)

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book Other Question

using -1 as a factor (divide)

(x^2-5x-14)/(4-x^2)



thanx
How would I figure out what the coordinates of the vertex is for y = x^2 - 4x + 5. I came up with the answer of (2,1). If this is correct thank you but if not please break it down