exam Maths Puzzle Numerical Ability

I would like to know how to find out the feasible region of a linear programming equation. I need the answer as soon as possible.

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exam Other Question

Given f(x) = 5x2 - 3x + 1, find f(-2) Hi! May I have some help with this equation?

Find all values of k that ensure that the given equation has exactly one solution.

8x2 + kx + 7 = 0