exam Maths Puzzle Numerical Ability

Perform Indicated Operation
(5x^2-7x+2)-(3x^2-4x-7)

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exam Other Question

These data represent the population of a certain geographic region.
Year Population (in millions)
1950 34
1960 38
1970
if negative 8 is less than equal to x less than equal to 6 and negative 3 is less than equal to y and less than equal to 5.what is the largest possible values of x squared minus y