book Maths Puzzle Numerical Ability

OK I need to simplify this question

x-2 / 3x-2y
times
9x^2-4y^2 / 2x^2+x-10

A) 3x-2y / 7x+1
B) 3x+2y / 2x-5
C) 3x+2y / 2x-5
D) 3x^2+2y^2 / 2x+5

Thanks!

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book Other Question

please tell me the proof for this question that Complex numbers and real Numbers are same numbers( I mean if we show complex numbres with C and real numbers with R we have : C~R ) Here's another:
"A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 15.4 m/s. The cliff is 43.0 m above a flat horizontal beach.