book Maths Puzzle Numerical Ability

Factorise the following and show the working out:

gy - yh - iy + xg - hx - xi

Thank you very much in advance

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book Other Question

two planes leave chicago at 8am, one traveling west at a speed 75 mph faster than the other, which is headed east. at 11am, the planes are 2,175 miles apart. how fast are the planes travelling? Perform the following complex number multiplication and write the answer in standard form:

(2 - i)(-6 + 6i)