exam Maths Puzzle Numerical Ability

multiply 5x-15/3x+9 * 4x+12/6x-18
a. 10/9
b. 10(x+3)/9(x-3)
c. 5(x+3)
d. 1

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exam Other Question
Order the numbers -23,15,-13,-2,14-5 from least to greatest solve 2x^2-3x-2=0