exam Maths Puzzle Numerical Ability

Problem#18
Multiply the following fractions.
(2x^2-x-3)/(3x^2+7x+4) times (3x^2-11x-20)/(4x^2-9)

Problem#38
Divide the following fractions.

(2m^2-5m-7)/(4m^2-9) divided by

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exam Other Question

THE DEGREE THREE POLYNOMIAL f(x) WITH REAL COEFFICIENTS AND LEADING COEFFICIENT 1, HAS -3 AND + 4i AMONG ITS ROOTS. EXPRESS f(x) AS A PRODUCT OF LINEAR AND QUADRATIC POLYNOMIALS WITH REAL COEFFICIENTS. use the graph of f(x)=3^x to obtain the graph of g(x)3^x-3+1