The demand function of a certain commodity is quadratic and passes through the points (p.q)=(5,1600); (10,900);...

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The demand function of a certain commodity is quadratic and passes through the points (p.q)=(5,1600); (10,900); (20,100); Determine the function in form; q = a + b₁ p + b₂p² The demand function of a certain commodity is quadratic and passes through the points (p.q)=(5,1600); (10,900); (20,100); Determine the function in form; q = a + b₁ p + b₂p²