exam Maths Puzzle Numerical Ability

I need help factoring this:

x^2-2xy+y^2-a^2-2ab-b^2

Thanks for your help and time.

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exam Other Question

solve each equation for x

x^2 + 4x + 4 = 7 How do I find the maximum height of a baseball which is hit with an upward velocity of 90 feet per second when the initial height of the ball was 3 feet?