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If alpha is a complex constant such tha...

If `alpha` is a complex constant such that `alpha z^2+z+ baralpha=0` has a real root, then (a) `alpha+ bar alpha=1` (b) `alpha+ bar alpha=0` (c)`alpha+ bar alpha=-1` (d)the absolute value of the real root is 1

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CENGAGE ENGLISH-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
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  4. Solve the equation x^4-5x^2+4=0.

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  6. Solve (x^2-2x-3)/(x+1)=0.

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  16. Find how many roots of the equations x^4+2x^2-8x+3=0.

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  18. How many real solutions does the equation x^7+14 x^5+16 x^3+30 x-560=0...

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