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17. Find the range of values of k for which the equation x + 2k = 3 + kx has real roots.
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[5]
18. A line y = mx − 8 intersects the curve y = x − 3x − 4 at two distinct points. Find the range
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of values of m.
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19. f(x) = 9 + 4x − 2x for 0 < x < 5
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(a) Express 9 + 4x − 2x in the form of a − b(x + c) , where a, b and c are constants.
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[2]
(b) Find the coordinates of the turning point of the function f(x). State whether it is a
maximum or minimum point.
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Chapter 2 Quadratic Functions 19
Chapter 2 Add Math (13 to 21).indd 19 14/03/2022 12:16 PM
