exam Maths Puzzle Numerical Ability

im not exactly sure on how to factor the denominators in this problem.

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exam Other Question

show how the distributive property can be used to find 10 x 147.

10 x (150 - 3) = (10 x 150) - (_________ x 30) =

1,500 - _______________________ = __________________
Write three quadratic equations, with a, b, and c (coefficients of x2, x, and the constant) as:
1. Integers
2. Rational numbers
3. Irrational numbers