book Maths Puzzle Numerical Ability

Simplify each rational expression using factoring.

24x^/3x

x^2-4/x^2+3x+2

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book Other Question

Diane can paint a house in 8 hours. Anne can paint a house in 10 hours. What is the fraction that they paint the house together in 2 hours? Simplify each rational expression. State the excluded values of the variables.
(3a + 15)/(a^(2) - 25)