exam Maths Puzzle Numerical Ability

Is an identity (true for all values of x)?
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exam Other Question

Graph Each Function and give the approximate coordinates of the vertex.

41. f(x)=x^2-x+9 Maximize the objective function C = 3x + 2y with the constraints x + 2y <-4, x - y <- 1, x >- 0, y>- 0.