exam Maths Puzzle Numerical Ability

x^7y^2-4x^5y^2-21x^3y^2

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exam Other Question

The surface area of a cube is 216 cm2. What is the length of an edge? Calculate the value of the discriminant of x^2+4x+4=0 ,By examining the sign of the discriminant in part a, how many x-intercepts would the graph of y=x^2+4x=4 have? Why?