exam Maths Puzzle Numerical Ability

Simplify

2x - 10 divided by x2nd power - 2x - 15
_ ______________
x2nd power - 25 x2nd power - 4x - 5

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exam Other Question

question: While the radical symbol is widely used, converting to rational exponents has advantages. Explain an advantage of rational exponents over the radical sign. Include in you Given f(x) = 1 + 3x - 2x^2, evaluate f(4+h) - f(4). Simplify your result.