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5. Determine the exact values of all real roots of f (x ) =7x5 + x - 42x3 + 22x +4x. Indicate where you used

5. Determine the exact values of all real roots of f (x ) =7x5 + x - 42x3 + 22x +4x. Indicate where you used a calculator, if at all. 6. Determine the exact values of the five complex roots of f (x) =5x' + 26x* + 44x' +9x2 -48x-36

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