exam Maths Puzzle Numerical Ability

I am lost on this one

3X^2-x-4<_0

thanks for your consideration

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exam Other Question

Write the following equation in the form of ax+ (or) - by= + (or) - c and the point slope form

slope undefined passing through (1,6) the length of a rectangle is twice the width. the area is 72 square centimeters, what is the length

A. 48 cm
B. 24 cm
C. 12 cm
D. 6 cm