Mathematics
JAMB 1982
The graphical method of solving the equation x3 + 3x2 + 4x - 28 = 0 is by drawing the graphs of the curves
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A.
y = x3 and y = 3x2 + x - 28
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B.
y = x3 + 3x2 + 4x + 4 and the line y = \(\frac{28}{x}\)
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C.
y = x3 + 3x2 + 4x and y
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D.
y = x2 + 3x + 4 and y = \(\frac{28}{x}\)
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E.
y = x2 + 3x + 4 and line y = 28x
Correct Answer: Option D
Explanation
The graphical method of solving the equation x3 + 3x2 + 4x - 28 = 0 is by drawing the graphs of the curves
y = x2 + 3x + 4 and y = \(\frac{28}{x}\)`.
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